OP is also only comparing top earners. For every athlete who earns millions, there’s probably hundreds of athletes who make around median income or less - it’s the kind of career where people will keep doing it even if it pays barely enough to pay the bills. There are a lot of doctors who make more than the poorer professional athletes, and doctors don’t age out.
Is there a point you can find in history where we paid doctors, teachers, and nurses close to what they’re worth and more than professional athletes?
It sounds like you’re nostalgic for a time that never existed.
OP is also only comparing top earners. For every athlete who earns millions, there’s probably hundreds of athletes who make around median income or less - it’s the kind of career where people will keep doing it even if it pays barely enough to pay the bills. There are a lot of doctors who make more than the poorer professional athletes, and doctors don’t age out.