I get it why it's easier from a game development point of view to put all Bards in the musician box. And it's really cool they made those songs.
For a non-musician style Bard, it should be possible to create a visual performer / dancer / acrobat type Bard subclass without requiring extensive writing and voice recording. A crazy acrobatic dance performance would attract attention just like the songs do.
A mysterious silent acrobat cat-burglar-spy type Bard would be a pretty cool character concept to balance out the flamboyant loud attention seeking musicians.
