I like to think I would have made it if I'd chosen rugby. I started off playing rugby league as well as union. I switched between fly-half and wing but I preferred to play fly-half.
Every fighter evolves in each fight. He's not the exception. He's still evolving. After all these fights as you say we can always expect to see the same version or at least kind of like the same things in his fighting style.
It's not all totally destructive or anything like that, but compared to what these people could do, if they would take on some of the biggest challenges, the opportunity costs are massive.
Inheriting a large sum does not automatically make one a better investor; a cautious approach, like buying index funds, may yield safer returns.