I use play/pause to start/stop the music on whatever I was listening to music on (Spotify usually, sometimes brain.fm). It's a background action, play music or stop music, no change to flow.

If Spotify isn't running for whatever reason, or sometimes even if it is, Apple Music decides that what I actually want is for it to steal focus for 5 seconds while it loads, switch to a full screen window and pester me to subscribe.

So in my case, the button click is intentional but the response isn't.