That’s assuming the artist does live performances. Not all do.
I think the more accurate answer is “it depends.” It’s best to find out the best way to support your favorite artists. Some have their own site, some use Bandcamp, some use Apple Music, some want their followers to use Spotify (because maybe exposure there helps them more). There’s an artist I follow that says Spotify the best way to support her; I don’t understand how, but it’s not my place to question the first hand source about what helps them eat.
Either way, it’s not as cut and dry as “Spotify bad.”