Yes, it does, because he has a lot more life ahead of him, and he doesn't know what it will be like. Lots of pronouncements I would have made at 22, if I hadn't had the humility to refrain from making them, would have been wrong. Even now, not far from four decades older than 22, I'm still hesitant.
> It's our life, anyone can talk about it.
Anyone can talk about the life they've already experienced, sure. But making pronouncements about a whole human life is going way beyond that. See above.
Sure, but that's not a problem, right? People are wrong all the time, it's fine. Also, it seems quite natural that a person who hasn't lived the entire life yet hypothesizes about what I'll be like, what it should be like and what it's like for other people. Moreover, what they say seems to be based on at least one research paper, so this is basically top quality wrt the internet's standards
You could ask a 5 year old for opinions, they're not going to be very well informed.