That doesn't make a difference. With most of the stuff, images will only be pulled when they are not locally present or stale. Ie pull if not present in K8. So doesnt make any difference.
In a cluster of any size worth discussing, this is hundreds if not thousands of pulls over public infrastructure vs private, which is a bad trade off in the vast majority of cases.
I want the container registry a local hop away from the thing using the images, not across the public internet…