The OP said Khabib had a net worth of $50M. I looked it up at celebritynetworth.com, and they have it listed at $30M. They have Conor at $120M - which means Khabib would still have 50% more than Conor without the boxing fight, if he made $100M in the Floyd fight.
You seem pretty vested in all of this, I was just trying to provide some clarity and insight as to why someone would be impressed with Khabib having less. Conor got $100M in one shot, of course he's going to have more overall. Without that one boxing fight, he has less.