Good chance he's trolling but Luke Documentz who also has pretty good development actually got DJs for sleep apnea so who knows. I'm betting that they probably have some poor oral habits that are the actual issue instead of their extremely small amount of recession.
Not sure how it works in other countries, but where I'm from the Genioplasty portion isn't covered and is a billed part of the process. However it ends up being rather low, as the healthcare pays for stuff involved in the actual jaw surgery like the hospital, anaesthesia etc. So while it isn't LITERALLY covered, it ends up being such a small price that it might as well be (my quote for Trimax lists the Genioplasty portion at 500 dollars). My guess is that it would work similarly in the US
