I think the cases where CIB, or more likely Loose, are the only options, I think I have no issue really. We're talking NWC carts and such at that point, and yeah there's at least some argument to be made for preservation in that regard.
But if we're talking grading a nice CIB Batman Returns, I just see that as a nice playable copy someone is now going to miss out on. And it sucks too cuz these games WERE within the realm of affordability for picking up a really nice CIB, AND being able to play your nice copy.
I'm glad I picked up the games I did prior to the recent hikes, but man there's some relatively obscure shit I'm after at this point that is just getting so painfully expensive.