It depends on the overall circumstances. If PSG loses a player, they are probably still alright and still the favorite to win the game at home, but if you have this chance to get very close to PSG in the table standings and then you receive a red card in an away game, it is game over.
Sounds like PSG always have better condition than their opponent in any circumstances. Sounds like they have a 12th player which is a referee who support their team to win any match. I don't know about their 12th player but I do agree with you that PSG simply are considerable stronger than other clubs in Ligue 1 and they have very deep player resource so that they can cover absence of one or two star players with their star substitutions who are always ready on their bench.
Also I don't know how the PSG players feel these days and whether they are still excited about the rest of the season. No more Champions League and no more Coup de France, but all of these stars are used to playing for the biggest titles until the very end. There must be a lot going on behind the scenes at PSG. Finding a new coach, finding new strong players etc. The next season is probably bringing about a lot of changes for the club.
I think their players are thinking more about summer holidays and summer transfer. They do know that PSG will have big reshuffle in their squad after this failed season in Champions League. Many old players will face with no agreement from PSG to sign a new contract and some will be sold to other clubs when PSG want to strengthen their squad with younger players.