It's really more about maintainable playlists, tbh. How are you going to scale your playlist management if you can't properly review changes and see history to avoid repeating mistakes of the past?
A lot of people like just managing playlists with a simple graphical console.
This works fine if you just want a playlist now, but you risk things like forgetting why the songs were added to a playlist; or forgetting which songs were in a playlist if the playlist accidentally got deleted.
Sure, describing it with Terraform may be more effort up front, but it saves effort in the long run.