What the hell does "true champion" mean?
It just means somebody on the internet doesn't know what a No True Scotsman fallacy is.
He isn't even one of the ones who got handed an "interim" that was promoted to full. Those ones I can see the argument for an asterisk. But simply knocking out the champion while being considered an underdog?! I don't see how that even offers to introduce an asterisk.
I've never been a Bisping fan, but he does manage to stumble around the ring and land a perfectly timed KO on a lot of people. It doesn't look flashy, it looks lucky. But luck is not a real thing; when you think you're seeing repeated luck, you're probably just seeing a hidden skill. He does manage to land those punches and win, over an over, so he's probably tricking his opponents with his movement just as well as he tricks the fans! He's not the biggest, strongest, fastest, smoothest, quickest, or most accurate. His timing isn't the best either, except when he's landing that KO punch. If he's only better during the last couple seconds of the fight before he wins then it is no wonder that he can be champion, or rated in the teens, because it is hard to judge what he is good at.
He's definitely earned where he is, I just wish one of his opponents would figure his timing out more completely and knock him out! It isn't enough to look down on him and get knocked out, they need to win if they want to be champion. And when somebody manages it, I'll be thankful!