In a perfect world perhaps, but this statement simply denies the statements and pictures posted by the OP. If, for instance, the receiver was drilled & tapped on the piss you'd be hard pressed to buy rings and bases "good" enough to correct the problem no ?
If this is to be a hunting rig and you can get to your "permanent" zero by way of internal adjustment then so be it I suppose. Otherwise something else needs adjusting. I can't imagine making big fixed ring adjustments without some consideration to lapping, but I suppose that depends on how careful you want to be.