Really? I'm surprised people still believe things like this.
Professional fighting with limited or no rules have consistently shown that a mix of BJJ, Muay Thai, Boxing, and Wrestling is what is effective and successful in 1-on-1 combat. Very few guys claim any other art, and if they do, if you look at what they do, it still looks like BJJ/Muay Thai/Boxing/Wrestling.
Yes, UFC is a sport now, but starting in 1993 until around 1998 or so, there were almost no rules. UFC 1, for example, you could poke the eyes, kick the groin, elbow the skull, whatever. Bite even. There were literally no rules in the early days, specifically so people couldn't complain that "oh, my best eye poke/groin grab/biting technique is illegal, I would enter, but I'm too deadly for the UFC"