922r is not intended, IMO, to be a clear and concise law.
It is the type of obscure, grey, unenforceable law that acts as a deterrent first and foremost, and as an extra layer of "screw you" to use when "they" throw the book at someone who was going down anyways for other charges.
922r's bearing on normal gun owners ... well, I'll let you decide that for yourself.
That said, when there is a simple way to be 100% legal, why not just do it?