I don't disagree with what you are saying, exactly. But this age of audio is more like vinyl siding audio compared to the real wood siding audio of the 70's, or, early 70's at least. Everything has to be plug'n play or auto correct or people don't know what to do with it.
Also, it was easier to find, or even recruit others into the hobby then. I know one other person now who is into this as much as I am and he does very little outside of his manuals. Per the music of the time, before you knew it, you had an audio club of sorts that physically/socially interacted regularly and this lasted a decade or more.
I'd be more inclined to believe that, via the internet, we are more in the golden age of mass marketing than anything else. It is increasingly difficult to find uniqueness in this hobby anymore.
Outside of a few deep pockets here and there, everything now is seemingly patterned after shopping at Walmart or, 'gotta have it now' faction of our financial existence. It's like trying to find a "fair" priced garden hose that doesn't kink just laying there. Even when you are willing to pay more for better, you can't because it is not economically feasible for manufacturers to compete against the cheapskates. The only other option is some way overpriced designer crap. Otherwise, better now, just means more of the same cheap China crap crammed in a box.