Glenn is in the business of generating clicks.
Has he ever made any notable recordings or albums? anything recordings anyone really aspires for? I’d recommend going through his work and seeing if you they are the sort of sounds and music you like.
He’s been successful at doing youtube, and fair play to him for that, but just because his stuff is based around recording, it doesn’t negate the fact that his work doesn’t sound very good. He’s a Youtube personality first and foremost and much more successful at that than producing or mixing.
Maybe for himself and his audience tube amps are overrated. His click bait titles, cartoonish anger, and disrespect for his clients all usually make what he’s saying seem a bit more extreme when often these things are much more nuanced. It gets a bit tiring when all he’s really geared towards is “LOOKK AT ME” rather than making anything artistically relevant.