Well, stuttering isn't quite like riding a bike. It's not that we don't know how to speak, it just that stuttering tends to get in the way. If you had, like, a stick in your wheels randomly sometimes, maybe that would be kinda the same. ;) At any rate, managing our emotional response to being in distress can be important. If some tech like this can help us get acquainted with the way we're feeling in times like that, maybe that's a good thing. Dunno. I don't recall any studies being done specifically on this. Speech therapy probably approaches it in a more direct manner as well.