Not sure whether I can agree with your statement. Neymar got injured during the 2022 FIFA World Cup as well. And that was one of the reasons why their campaign ended at quarter-finals stage. Neymar took part in that match against Croatia, but he was not 100% fit. Ancelotti may think that Neymar is not an integral part of the Brazilian squad. But IMO, Brazil struggles against quality sides when he is not present. This is not the Brazil team that we all know from the 1990s or 2000s. Apart from Neymar, other players doesn't have the capability to win matches on their own.
Not sure if you got my statement correctly. Of what value is a player to a team when that player misses most of the big games due to injuries? What would Messi have contributed to Argentina and their way to becoming World Champions when he missed 50% of the games in the last 8 years? Neymar is never really fit and if he is, he often gets minor or major injuries during games and can't finish them. He is also a highly emotional player who never had the quality to lead a team when it was not looking good.
All of this doesn't mean he didn't have impressive actions during games with his speedy dribblings and some amazing goals. But really, I am sure you would agree that there are not many players who lacked consistency so much like Neymar. In 6 years for PSG he played 112 games across all competitions. His score? The score is great. It has never really been a problem, but when he doesn't play all his stats are worthless in important games. That's a problem and also his tendency to play like a little girl and dive all the time was a problem. I really wonder if he had any offers from a top club from Europe this summer. I don't think so.