I’ve heard Jagger describe how much preparation he puts in before a concert, it’s pretty impressive. I think he does it as much because it keeps him active and healthy as much as anything, it’s not like he needs the money ;-)
Last year when the Stones were touring there was a meme going around. It was a picture of Jagger next to a picture of Mitch McConnell. Turns out they’re the same age. The tag was something along the lines of “explain why sex, drugs and rock and roll are bad again”.