That's interesting because I pay for Spotify and I've discovered a ton of new artists through them. I may not be purchasing their album, but I'm spending plenty of money, sometimes over $100 to see them live multiple times or to buy merchandise. Streaming has definitely helped with exposure for a lot of new or indie artists.
Unless you (and the average listener) prove me that you'd spend as much or even more otherwise, I'll call this anecdote bunk. The falling industry revenue numbers clearly point to the fact that your not average.
BTW, when in my late teens and 20s, I routinely spend $1500-1750 a year on music (that's about $2500-3000 dollars now) (concerts,CD's) in the 1980s and early 90s. I know nobody now that does that; not even close. People have been addicted to $1 tunes, youtube and streaming. I probably saw 15 shows a year back then, at least.
Indie artists existed BEFORE streaming, the web and they lived just fine. You think they just popped up in the last 2-3 years?