I think the problem is like communists believe all humans must live and thrive in an identical system that benefits everyone equally - you believe all players have the same talent at the same age headed for the same outcome.
Neymar - from his worst games to his best showed he has raw ability. He showed he can win a game on his own at times. that is what was expected of him. Gomes.. well now Gomes has looked below average most the time - with his best moments lifting him to the average category. Therefore ideologue apologies for him based on his age compared to other players are null and void. Not all players develop equally and not all players have the same levels of natural ability, speed and quality on the ball. We have seen around 3600 minutes of Gomes at Barcelona. We know the type of player he is by now.
The Catalans were correct to boo him. I hope - like all the Catalans who booed him and Arda - that he finds a new club soon and is hugely successful there. He is just not Balrcelona quality - never was.