I'm not sure why you're claiming that bards was interpreted as musicians only. Yes, we are choosing a musical instrument during character creation, but later on our bard can refer to themselves as "a poet" and perform an imitation of another person's voice, and that's just during the very first dialogs on the beach. And if you take off the instrument your bard will whistle the tune, and Vicious mockery is shown as if the bard goes all stend-up comic.
I'd say the game suggest that the bard is a bit of everything. I suppose your suggestion would emphasize that idea. But I certainly could live as not a musician bard without them.
