Can't agree with that statement. You are comparing apples to oranges, IMHO.
That's okay I don't need you to agree.
I hold the lower and have the upper moving in relation to it every time I pull the trigger, even when benched.
It might be marginal but I'm interested in eradicating margins... mostly everyone who is interested in a 1MOA gun—given that 1MOA is not match standard these days—is trying to do the same thing. Why ignore that one thing to which there are several simple fixes?