Very much the question.

Or why do artists use platforms that give back close to nothing per play and that doesn't let users have access to a wide variety of music thru its algorithmy. Also streaming pollute more than listening to music locally.

What is the catch here?

EDIT:

Thanks everyone for your insights! Unsurprisingly, it's practicality that wins the public and makes it mandatory for the artists to use the unethical platforms that are Spotify and Apple Music. Sad state of affair indeed. Let's hope more and more artists will also share all their production on Bandcamp so the ones who boycot Spotify and Apple Music and wish to encourage directly their favourite artists can keep doing so!