The nicest example of this I've seen is that Tim Ferris won a kickboxing championship without being a kickboxer, https://www.martialdevelopment.com/how-to-win-kickboxing-wro... The fallacy is that winning a world championship at kickboxing must mean that you're an excellent kickboxer, but nope.
- if the fight was in China, big deal. They have a history of pre-MMA technique, so most of their styles are only for show. (That's what the fake Shaolin monk, Yi Long, has been demonstrating recently online, defeating leading traditional opponents using intermediate kickboxing techniques.)
- fights in China are fixed, so Tim winning anything was unlikely without connections/graft
- it takes a special kind of asshole to proclaim being a winning fighter by exploiting loopholes that way. I hope somebody punches and breaks his orbital ASAP.
Respected fighters wouldn't fight or spar with anybody who writes that way. Tim didn't prove anything, except that he's an asshole who can't be trusted.
You can learn more about MMA from inside China on Ramsey Dewey's Youtube channel:
https://www.youtube.com/user/balletman
If you want to see what world-class MMA fighting looks like today, search on Youtube for "UFC Khabib" or "UFC Israel Adesanya". They would destroy anybody inside China in seconds.