It isn't even fatigue, it's common sense, there's a finite number of hours in a day and you can't flood the market with the same GAAS trash asking you to invest time in it, so from all them, just a few will survive, it's always been like that
If I didn't stop playing GTAO, I wouldn't be able to play my huge ass backlog of games, imagine it's the same for anyone, you just focus on one game and stick with it till you got enough and move on, no one is going play with a chronometer in hand, Arc Riders ninety minutes, then stop to hop on idk, Marvel Rivals for one hour and then decide the las two hours will be dedicated to Marathon, that's a work schedule, not an fun gaming session