Unable to play my entire Apple Music library on Apple Watch

so i don’t need to download any playlists onto my Apple Watch in order to play music from my Apple Watch - however - i am not able to play my entire Apple Music library on my Apple Watch without the Music app (on Apple Watch) quitting on its own.

So why can i play a random playlist from my Apple Watch but i can’t play my entire Apple Music library?

[Re-Titled by Moderator]