I sparred against mediocre boxer in my first boxing training session ever with very limited skill set and no mouth guard. Now, the mediocre amateur boxer was still much better than I and I couldn't do anything to him while he was beating me up. I sparred two rounds despite gassing in first 15 seconds and being a punching bag. Next day I sparred with him again and got beaten up again.
Am I some fearless warrior because I was willing to step up against much better competition and I took it on 25 second notice with no background in boxing? So hell yeah I would take a fight against Jon Jones if I was anywhere near UFC level, got paid really much and wasn't too proud to turtle up when getting some damage.
No biggie for me and no biggie for many people. Now, I'm smaller and totally unqualified to fight any pro or amateur LHW so I wouldn't take fight against Jones for any money but if I had skill set of Chael I would.