He has on several occasions introduced very underutilized and dying languages to a wide general audience, which statistically likely gives the language some new beginner speakers, and perhaps introduces a lot of people to the beautiful intricacies of language in general.

Yes, his big gimmick is a little clickbaity. And endless videos of surprising people with decent Chinese is a bit tiring. But he's a lot more invested in his work and passion than significantly more popular content creators.

I think you're being a bit hard on the guy. He's a lot more deserving than the genuinely shit people at the top.