???
Following passions has always been a thing. Otherwise we wouldn't have an enormous history full of poets, writers, artists, performers, philosophers, religious scholars, athletes, etc, etc, etc.
It's not like this is a new concept at all, it's just a new concept that the non-wealthy generally have these ambitions as well.
Why do poor kids from small towns have these dreams now-a-days? Uh, because we can. Thank God no one ever told me not to or to be "realistic" and focus on being able to support my family, because I really, really like not wasting my precious time doing work I don't love.
In reality though, I see much less acceptance of following ones passions these days. Watch what happens when a bright, young person says they study English Literature or Philosophy, or if they say they want to pursue the arts. Most people blatantly shit on them and say derogatory things like "enjoy your job as a barista".
The world doesn't actually support dreams, it supports ambition, and there's a huge difference.
There aren't actually a lot of us out there voluntarily making substantially less money for the sake of finding more meaningful work, and I can speak from experience that when we do, we get heavily questioned for it.
Of all the thousands of young people I've advised and coached in my years, very, very few of them feel allowed to pursue their real passions over financial security, and research about young people clearly backs up my personal experience.
So I'm not even sure where this misconception is coming from. Sure, the media portrays it as young people always following their "dreams", but the reality of millenials at least is that they're overworked and rather focused on financial security.