It's the sign of the times among other things. Back then thousands of kids would "experiment" with music and play in garage bands. Now, kids sit in garages and play video games and text.
“Now, kids sit in garages and play video games and text.”
Probably a lot of truth in that observation.
But some of it is surely that they are exposed to so much garbage posing as music that they don’t know any better. And the entertainment industry is no longer designed to let creative outsiders get a hearing. A lot of what we heard started with airplay on local stations. Not sure there is anything remotely like the AM rock stations that could give a new song some notice.