Every musician I've met uses Spotify, I've never met a rich musician.
It was even worse in the Napster-onward period before streaming became so popular and everyone was torrenting music by the ton, including musicians.
It was similar in the film industry (I work in film post production sound). Few people even in my business seemed to mind downloading movies for free to watch at home, even as that very behavior helped undermine our own livelihood to some degree. I never downloaded any pirated movies or music, because I always saw it as a form of stealing, and saw it as undermining our own livelihood. It's not as simple to say that the situation that came out of this era was only due to pirating, but I can say the pirating era tracked quite well with a reduction in our pay - our earnings plunged and have never come back close to what we used to earn.