Fair enough. For me it is about consequence in your arguments. If someone says Ronaldinho/Maradona were better than Messi because of their abilities on the ball despite scoring less, I am okay with that. But if they proceed to place Cristiano ahead of Messi because he scores more, it gets ridiculous for me and reveals that the one saying it is not able to look past his personal preferrences. I hate double standards.
I can understand it up until some point. During the time Messi won his first four Ballon D'Ors I didn't really appreciate him. Barcelona got rid of Ronaldinho for him and he played so differently. I saw him playing and thought he had no skills, simply outran his opponents and scored. Only a few years after Ronaldinho's prime the whole world was talking about Messi, Cristiano and their goal records. For me, solely because they scored that much everyone suddenly placed them above Ronaldinho. I think it was around this time when the whole "greatest player" discussion got so focused on goals alone and got really annoyed of it. Well, I still am, but I came to realize that Messi was much more than goals although he didn't really do flashy things on the ball like Ronaldinho. With Cristiano it is a different story. I initially preferred him, to be honest, because his style was closer to Ronaldinho although I felt like he does this stuff only for the gallery and without any sort of end product. Just piss taking for the sake of it.
But at some point you have to overcome your personal preferrences. Messi wasn't as flashy but his impact on the game is just gigantic. I think after all, even without his goal record he would be better at playmaking, dribbling etc. as the likes of Ronaldinho, Zidane, Maradona, Zico, Laudrup and so on. He is simply pure efficiency. At their very best, all these players are probably on par but then there's Messi's longevity. It is just incredible that he keeps up this level for such a long time.