It is not vague though is it, i mean he's been a manager for what, over 10 years now and he's done absolutely nothing of note except bad things or things that are not worth writing home about. So getting a team relegated, and then nearly getting them relegated again in the next season before having to be sacked to save them from it doesn't say much? What? would you be saying the same thing if we hired another manager who hadn't played for us and had done that exact same thing, no, you wouldn't. You can say what he did in Norway was pretty good but then his team got better AFTER he left, so, really, how was it any good?
The fact is, every manager plays youth, especially if they are told to, hell Rashford got his start under LVG and arguably McTominay got his under Mourinho, it's a complete myth that we need someone of "United DNA" to blood in some youngsters and that's what the club needs right now, well, every club should be doing this, so should every manager, it's not something exclusive to an ex player of United that gives him some secret sauce to doing it.
I'm sorry but people like you would see us sink down even lower based purely on dreams, in the hopes that contrary to all the evidence, he might become good here one day because he used to play for us, you have no actual tangible evidence to back up your claims, then we will dither and let better managers go elsewhere and we are left back at square 1 again hiring someone we shouldn't hire because we have no choice now.
Sorry but no, he hasn't "earned" any time here, people are clamouring for it because they want the romanticism of him becoming the next Sir Alex, it isn't going to happen.