Your car registration is more private in every state than your FAA reg. The key question, is there a public benefit from having your information available to anyone and everyone?
If anything, if I were a crook who wanted to target someone with assets, I’d hang out at the local airport and write down N-numbers, and go to the FAA website for the owner information. To get that info from a luxury car owner, I would have to follow them around until they drove home. Much harder. Thanks, FAA.