I've never heard of anyone using Audacity to play audio. No doubt there
is a way to do that, but that isn't its function. It's an audio editor,
not an audio player. I'm surprised it can even play audio streams as
I've only ever used it to edit audio files.

Well you might need to play back your audio that you edited to check if you got the editing right.

Nevertheless, a feature not working is a bug. Saying that its not used very often is not a very compelling excuse.