PSG has everything to be attractive for recruiting players and also the PSG team has strong enough finances so I think that will be a consideration for Osimhen to choose PSG and also PSG's progress or targets are quite good so it is likely that the players will continue to improve.
After Mbappe's departure, PSG had to look for a suitable replacement and in my opinion Osimhen is the right player to fill the void.
Not "everything", they are known as the farmers leagues winners, and they almost always fail at UCL, meaning that a lot of people will not want to play there. The pressure is that they should win the league and the cup and the UCL title to make a treble, then we could say that they are great, but until that happens, just winning the league means absolutely nothing. Why would any player want to have that kind of issue?
I do not think that they want that pressure, sure every team has pressure, City would have the same pressure, but they would have the chance too, PSG almost always fails at Europe so the pressure isn't always that great and mainly doesn't make sense at all, would have been a bad idea to go there. Of course if you pay a lot then many would join, just not enjoy the life there.