This isn’t true in a lot of states, all that I’ve seen or encountered actually. Not only can you register a vehicle on a suspended or revoked license, you don’t need a license at all. I know different states have different requirements but I’ve never seen a state that requires an active, clean, valid license to register a motor vehicle. Ever. At the end of the day the states are more concerned with collecting the taxes and fees associated with vehicle purchases and registration.
The argument can also be made that just because you can’t legally operate a vehicle, doesn’t exclude a legal driver from operating your vehicle for you.
The issues that would arise from a suspended license would be in obtaining insurance and proof of, which IS required for registering a vehicle in most states. Many policy writers will reject a request for insurance by a driver with a suspended license and those that will accept an application for coverage will increase the payments/premiums due to obvious increased risk of insuring a driver with a suspended license. Most policies also will not cover drivers involved in an accident that occurred involving the policy holder operating a motor vehicle on a suspended license, regardless of “at fault” findings as well.
Lastly, of course it would also be against the law to operate the registered motor vehicle if that operator was doing so on a suspended license. That said, there are a lot of illegal things but that doesn’t keep people from doing them regardless unfortunately. While laws are intended to prevent people from doing things that shouldn’t be allowed, sadly this doesn’t work and they only act to enforce consequences for those that choose to do so anyway.