Currently PSG is not a suitable team for talented young players like Lamine Yamal or Osimhen if they want to achieve a brilliant career. PSG are one of the top teams in Europe but they are almost never one of the favorites to win the UCL. They dominate Ligue 1 and almost every year qualify for the UCL. But Ligue 1 is not a league with high intensity and strong teams. A team with a very large cash capacity like PSG can bring in any player they want. But not all players need money, especially if they are young players. I think it would be wiser for young players to choose career over money.
It's very true what you say, for me Ligue 1 is interesting , but it doesn't represent the strongest league in European clubs. If you want to measure yourself I think the first option is the PL, if not , the Second best option I see is La Liga , and the third option I see is the Bundesliga , which for me has a great level. Now as you say, you're right, some prefer money over career, but if they want money it's preferable to go to Saudi football, which isn't bad, they have a good level now , because it has a High level According to the games I've seen, and I think it has the Highest level in Football than Ligue 1 , of course that's my perception, I could be Wrong.
French Ligue 1 which is mostly peoples called farming league having huge decline in quality and performance in last few years with no revival work done by French soccer Federation is surely miserable now things are going from bad to worse with PSG is having nothing to develop things as mostly they love to have quality players even on high price and done their job which is winning and having good results in UEFA Champions League in last few years they spend huge amounts on few transfers which fail to give them Champions League title, but sadly they are still failed to understand things and having no intention to change their strategy which give them better results and strong base of having quality players.
Now again they are working on few quality players to join them and having better results, but this is surely having not solid strategy for them to develop things we have reports they are working on few top players to join them for the next season, and they are able to stay at the top in this league and having good results in Champions League with all will be available in few days.