What is a hipster? Look at this fucking hipster...

Wrong. Take a look at young aspiring musicians, how many of them will be buying the sheet music to Boyonce, Rhianna & GAGA?
ZERO
They are all still going back to 60s, 70s and 80s musical compositions to learn from.
Hell, the names mentioned will still be looking to older standards to sample for their next 'hits'.
I think the overwheliming majority still understand a good tune. Sadly the it is the marketing depts, money and powers of the majors that appear to have changed what people like. The good stuff doesn't really see the light of day outside of late night specialist shows. Great music is still being made but unless you have the time and the knowledge to seek it, you're stuck with Walsh, Cowel, Cole and Dani.

To say you can't compare older musical forms with those of today is also wrong imo. Listening to stuff of the seventies (a time of deep political strife) gives me far more to cling onto than anything Lil Wayne 'drops'.

Well, actually, the sheet music industry is propped up almost entirely by modern music scores of artists just like the ones you mention, not classics. But that is missing the point, since sheet music is not ubiquitous to making music, at all.

I see your point about society, music doesn't really reflect anything much right now because there isn't really (arguably) as much going on.
But there was still plenty of tripe in previous decades. Overwhelming amounts of pap and smeg. And it turns out that the music that stood the test of time, and became "classic" is often the very stuff that was berated at the time for being talentless noise.

All music is sneered at when it is contemporary, its way more hip to sample something old.

I don't think you can blame the overwhelming majority of people that enjoy shit music on "the man" either. There is plenty more going on than that.