People who pirate in the year 2025 are almost definitely going to be spending more on music (physical media, merch, tickets, etc) than the average Spotify subscriber. This was true ~20 years ago and given the ease of Spotify and the relative pain of pirating, I would imagine it's even moreso the case today. And even if they spend half a Spotify subscription on music, that's more money going to artists than a Spotify subscription giving them carte blanche access to most music.