It sounds like a mixed issue to me.
If you narrow it to "what is hydro indica doing to people", it's maybe a little different than the overall down cycle of civilization. Although both are related to each other.
The first time I got high as a kid, I smoked something and walked home. Can kids even walk home any more? Anyway, the first thing I noticed about "what it's like to be high" was that a cat called my name...so no, I wasn't a zombie staring at a screen.
I would tend to agree with Weird that the folks who can't appreciate a non-narcotic high, probably can't even sense it to begin with.
Musically, for example, I was a fan of Krokus. They were weed heads from the 70s, sure. However, original guitarist Tommy Kiefer was a heroin guy. Despite that, his playing was creative and energetic, nothing that you would associate with serious narcotics. Although it led him to a fast and horrible demise.
It was the record company that paved and emasculated them for "The Blitz", as most companies did with most bands at the time...look, the bass is a background instrument, you've got to take the edge off that guy's voice, and go out wearing spandex pajamas or something. Didn't work out so good.
So I think in almost every case, whenever anything "goes commercial", it waters down to the lowest common denominator. Desire for profit is a fairly ugly enemy of the grassroots, independent underground, and I'd be impressed to find a situation where that does not apply.