

They’re also more expensive than regular copper or aluminum wiring, and in this case I suspect that their required proximity would be a downside.
I think I’m going to have to say “citation needed” here.
There are different grades of fiber optic cable, but for short distances you can generally use the lowest grade, so that’s probably what would be used if they were just components in a device, and that stuff is dirt cheap.
On the other hand, currently audio equipment tends to need higher end copper wiring, shielded cables, gold plated connectors, etc. digital interfaces are much less demanding of course, s/pdif or HDMI for example.
As for your comment about being vulnerable to drops and bumps, yeah I think you’re certainly right about that. And honestly, there are some other potential issues with the idea too. Foremost, a microphone like this would probably require a whole lot more analysis and signal processing than you really want for a simple audio input.

Sure. But if the brakes have not failed… Then it’s safe to use for a reasonable period of time.