Any artist can remove their music from any service including Spotify by simply telling them to remove it (usually via a label or distributor). Neil Young has every right to do that, but what I don't understand is why he chose to advertise the decision with a public ultimatum?
Kid Rock just released an anti-vax song called "Let's Go, Brandon." To be consistent, shouldn't Neil Young remove himself from Apple Music and any other platform that includes Kid Rock?