Is hard work the same thing as intelligence, though? If you make the same amount of money as someone else, but they worked a lot harder than you, does that make them smarter? What if you work hard, and don't make money?
I guess our point of contention is the definition of "genius". I think Conor has great skill and a certain level of "creativity" which he displays in his fights. That consists of awareness of the physical space around him, integrating muscle memory with in-the-moment decisions, etc. There's a mental component to it. I don't think that makes him a genius, though. I don't think fighting talent translates over particularly well, or at all, to other fields of intelligence. I don't think that Conor could write a good novel, or do complex math, or figure out solutions to political problems. I mean, it's possible that he could, but I don't see evidence of that just from the way he punches people, or the way he attracts twitter fans by acting cocksure.
Conor is better at speaking than most UFC fighters (who can't really speak at all), and he's made money, so that might inform how we view his intelligence. But I'm sure you could think of fighters that react quickly, use their fists and feet very well, execute unexpected moves, etc., who are dumb-dumbs in general life. Or is that not true? Are all good fighters smart? Are really good boxers very smart? Because I see a lot of great boxers that are idiots.