Yeah it must be. Otherwise I'd be able to come up with witty one-liners like you. Lets leave it at that.
Read your posts again.
You are creating fake arguments that don't matter or don't matter nearly as much as you would like to think.
You're not talking about the player itself, their strengths, weaknesses, role in the team, mental profile, contextualizing the environment they play in, the tactical setup they're playing in, how it's different from Ole's time, etc.
It seems like your arguments about why Maguire is apparently not good enough for xyz ambition is because we bought another 4 CBs since signing him...or that we didn't win the league with him in the team?
Football is a very complex team game on the highest level. You could put the best player in the league into the dead last, worst team and they'll still go down in 20th, or at best 19th/18th place. Their numbers and statistics will also take a hit. You could also put players from Leicester or Southampton into the City team and they'll still be great, and still be a serious contender for all the trophies at the end of the season, as they are now. And the player's stats and performances will improve.
Also, you defend together as a team, you cannot defend alone. It's usually impossible to judge a team's defensive performance based on one player, unless it's several individual, unforced errors from one player, for example.
A post from today in Martínez's performances thread is a great example of what I mean. Dalot is instructed to regularly invert into the midfield in every game. Sometimes Eriksen or whoever plays the left sided CM will tuck into the LB position as a makeshift solution until Dalot returns to his position. But we've seen in most games that it sometimes doesn't happen, which leaves Martínez with acres of empty space around and behind him, which will be taken advantage of by any pacey opposition player if they manage to recover possession and play them into that large space. If it was Maguire in that LCB role, he would get ridiculed for not being able to deal with such a situation if it leads to a goal. Martínez cannot deal with it either, but it isn't his fault that he got into such an exposed situation. The big difference compared to let's say Dias at City is that he almost never gets put into situations like that, but when he does, he does tend to get absolutely done 1v1 vs a pacey attacker. But we rarely see it because he's properly protected by City's system (and when we do, with City being good, and him being a very decorated player, it doesn't get talked about). His weaknesses are hidden, and his strengths are maximised.
Rashford gets criticised for every single thing that goes wrong on his side, whether it's a defensive or offensive issue, but how many wingers like him would be any effective without any overlapping runner to help him, often any movement in the box, etc.? Not many. Once again it's just a difference of environments and tactics, but a lot of people will dismiss that when comparing him to another team's player in the same position/role.
And when you compare players from teams that are usually close to each other in the table, the gap gets even smaller. An example that involves Maguire: If you swapped him and Rúben Dias, and made no other change at either United or City, do you believe Maguire would look out of place in City, at the centre of the 2nd best defense in the league, and in a tactical system under Pep that's light years ahead of whatever ETH is trying to implement at United? And do you believe Rúben Dias would suddenly boost our team on his own so much that we would finish on 80 points at the end of the season, instead of 60? The answer to both questions should be no, hinting at Maguire being good enough to play for a title winning team.
The most probable outcome is that it would suddenly make Maguire look like a world class centre half, and Rúben Dias would look like a shadow of his City version.
If you isolate Maguire's performances at United in Ole's two full seasons (and I'm talking solely about those two seasons because those are the two seasons where he was a starter for us, and not because I believe he became a shit player after that), what do you get? A world class pure defender, a high block enabler, with great communication, great anticipation, great organizing, aerial and physical dominance, etc. almost anything you can ask from a CB other than blistering pace and mobility.
But then how do incredibly similar players such as De Ligt, Dias, and Botman maintain their status as world class or at least very solid defenders, playing in high lines, performing well, and doing the same things for their team that Maguire did for United under Ole?
The answer to that is that the public perception of Maguire is skewed by 99% of football fans not actually knowing anything about tactics, or player profiling, and then they see Maguire being ridiculed and abused on social media, and a lot of them will just go along with the flow, because they can't form their own opinions about the player as they are not qualified to, as harsh as it sounds. And I'm not saying I'm a football expert, I would probably be working in football if I was. But you don't have to be, in order to be able to realize that Maguire is an absolute quality centre back, and one of the best among players that are similar to his profile. The 3 cbs I listed, for example, all have similar weaknesses, similar strengths, but mostly play in different environments, and I guess they're not as "memeable" as Maguire. And they didn't cost 80m, or play for Manchester United (didn't use to in de Ligt's case), so that the pressure they're facing is way less.