But even without the physical decrease we suffer from aging, I believe professional esport is much more exausting thant professional sport.
Compare how many days pro players spend at home. In sport, competitions are regulated in order to let some required leaves between each other, players make quick go and back of about 2 days max every weeks, while in esport they travel for 2 weeks of competitions.
In sport, there is staff for everything, players just have to train their skill. While in esport, players are part of creating the strategy, creating tricks, etc..
Also, to be on top, pro players in sport train few hours a day, way lower than esport players that are training for 8hours, plus individual skill training, etc..
I honestly understand why esport player stops after 10/15 years as this is an exhausting life and time consumming life. Once you hit 30+ years, you want to settle a bit more, thinking of kids and stuff like that.
And this is incompatible with professional esport player career I believe.