Troll, this is a FAQ ruling you might want to use or not. I know that you don't like it but I think its fine.
Vehicles are deathtraps anyway, so imo there should be a use for Rhinos other than being damage sponges for more expensive vehicles.
If you allow a Chimera to move in the charge phase, let the Ogryns charge (rather than using the stupid if effective move -> autohit Ripper Gun combo) and then let the gunners fire in the shooting phase, you can still lose 350 pts. if the Chimera gets destroyed through overwatch.
Imo it is balanced and there might be a use for Razorbacks who otherwise pale compared to Predators.