Why was Chuck Liddell so successful? I don't think he ever pulled off a sub for a win. And when he finally started losing, who was it against? Other punchers that could move. And what did those punchers become? Champions.
You don't know much about Chuck do you?
Chuck was so succesful because he used his very good WRESTLING background in reverse, he used it to stuff takedowns and stop other wrestlers taking him down. He could do this because he wrestled at a high level for years and knew he could outpunch everyone if he kept it on his feet. You don't do that without very good wrestling and lots of work on your takedown defense.
Even Holly Holm has spent years grappling and defending takedowns.
It's very rare that you get a pure stand up fighter stuffing takedowns from a world class grappler, it's why wrestlers are so effective in this form of fighting.