I agree. I'm not sure how he reached celebrity status but good for him. I also agree so much on the term best. What's best to me could be crap to someone else.
I'm speculating, but would think he reached his celebrity status from being one of the most vocal and an early adaptor to the YouTube medium in terms of DIY. He may not have been the first, but he stuck it out where others dropped off. Tens of thousands of great mixers out there, but not many are willing to show their face on YT.
I applaud his success. I’m sure it took great efforts and dedication.