Blake Griffin has earned $259M in his career, just from the NBA, and who knows how much from endorsements and other income. I can see why he might not want to go through the grind of an NBA season, just to mostly sit on the bench all season and then not play in the playoffs. I am sure it is a tough call. It seems he loves playing basketball, and once he stops, that is it. When he does play, his knees probably hurt for days, if not the whole season.
I just noticed something on Spotrac. He has paid $1,118,442 in fines over his career, Wow. Most of it ($859,442) was the result of a fine and suspension for for punching a team equipment manager in 2016. I don't remember that. There is also $15,000 for verbal abuse of a game official during UTH-DET game in 2019. But even that aside, that is a lot of fines for technical fouls.