It's hard to see right now but if the game is successfull then 18 y/o kids could end up having a ~10 year career in OW then move on to other things or other roles in the game.
Right now though there isn't enough space for everyone at the top level so players in their mid to late 20s that aren't finding success need to evaluate the risk/rewards of staying in the scene.
He's obviously a smart guy, glad he's kept himself options for the "after Overwatch" period of his life after.