Making such a bold, unsubstantiated claim is a curious item in an otherwise detailed document. I went looking for other explanations and found this gem: https://www.reddit.com/r/mpv/comments/m1sxjo/it_is_better_mp...

I think it might be one of those classic “everyone should just get good like me” style opinions you find polluting some subject matter communities.

Yes, absolutely. The top answer on that Reddit link starts with: "MPV is the ultimate video player on planet earth, all the others are junk in comparison" and doesn't mention VLC at all. That's not a helpful answer, it's just signalling that they're a huge fan of MPV, with nothing to suggest they've ever even tried anything else.