Well, there's a few aspects of it. If they push it, it could make my experience worse (This tends to happen with any service that's pushing AI). I also consider it to be highly unethical, so it lowers my opinion of their ethics (not that it's high to begin with) and makes me more likely to protest them on ethical grounds. After all, I'm here now instead of Reddit for similar reasons.
That seems like a quick way to get me to cancel my Spotify subscription.