How can you say a young player's career would be ruined if he goes to Barcelona? The same Barcelona that have seen so many young players develop out from? C'mon!!. I don't think there's any single big club in Europe that will develop a young player more than Barcelona.
You say Manchester City will help him develop better, that's true only because of tge coachbtgey have now. How many young players did Manchester City produce or nurture till they became world class and the best in their positions before Pep Guadiola? And even with Guadiola, the only young boys I've seen that are convincing are Foden and Alvarez.
With Manchester City it's the coach, but with Barcelona it's their system, no matter the coach. A coach that doesn't know how to handle young talents very well doesn't succeed in Barcelona.
He is not far from saying the truth, didn't Ansu get promoted Barcelona Atletic to main Barcelona squad, there were many PR for that boy because of his potential and age, he is just 21 years old but what happened later, he was loan out to Brighton and guess what, they don't use him frequently like the way other people are used by the club, I have almost forget about him if not for this your comment. This is not the only dream Barcelona has killed, if Neymar was given the proper PR, he might even sitting next to Messi but all credit always go to Messi alone all the time.
I may agree that currently, looking at the situations and projects of all the clubs interested in Claudio Echeverri, Manchester City is the best option, but saying they're the best because his young talent would be wasted in Barcelona is not true.
Football doesn't work the way we think sometimes, because you want a player to how here doesn't mean he will succeed over there and if he does, it possible that his pay check might be little to him or probably the club might not even want him for some reason. Osimhen come to mind for Chelsea people that are angry for his choice of Napoli, he knows what we don't see and that's the same for other players decisions.