Look how few airplane accidents there are. That is because of regular testing, both medical and proficiency testing. I do it to keep my pilot's license active, but it is a pain.
I think proficiency tests for MH are just common sense. If it get's some MH driver's off the road, that should be off anyway, then so be it. It will not kill the RV industry, just like it didn't kill the motorcycle industry when Florida started requiring a proficiency test to have the motorcycle endorsement put on your driver's license.
