Stories/fictions and music as covert devices for speaking of actualities/truths
You raise a valid point about the “distancing” nature of writing vs speech but I don’t think the most important distinction is between modes of discourse (e.g. spoken vs written) but categories (e.g. political vs philosophical etc.). In conveying meaning, we’re always navigating discourses that have their own meanings “built in” and which form part of our overall contextualization and judgement of the message we receive. Discourses can bully meaning into corners from which it's hard to escape. Fiction then, I agree, can be a useful way to allow meaning “space to breathe”, especially when done so that the message is presented organically; i.e., it imposes itself naturally out of its context rather than directly exposing itself to the filter of a discourse that protects against it within a subject.
For example, if the message is political and you choose political discourse to convey it, you're in an arena where contentiousness is built in because group identity is at stake by default (political discourse taps into sociality in a fairly primal way with the rule tending to be “fight your corner” rather than “listen”). Fiction gives you a route out of this problem at the expense of making it more difficult to express your message.
The more general upshot of this is that our ideas are products of a symbolic order that can be understood as a complex of discourses that we can use as tools to convey meaning in more or less effective ways. “Truth” is a tricky concept to apply to such a situation but certainly an artist through fiction can compellingly convey an authentic experience of reality without being overly circumscribed by the predisposed notions of “factual” discourses.