Redhat UBI Source - Public access vs protected?

In the UBI docker files, they are currently configured to use the protected source within Redhat, however public repositories are available. Is there a reason to use the protected source for the UBI images instead of the broadly accessible ones? To quote Redhat:

"If your intent is building only freely redistributable UBI-based images, you can opt to use the Red Hat’s public registry instead of the Red Hat’s private registry."

Reference: https://developers.redhat.com/blog/2019/05/31/working-with-red-hat-enterprise-linux-universal-base-images-ubi/

The primary change, as noted on the page, is: "Replace the private registry host name registry.redhat.io with the public registry host name registry.access.redhat.com..."

I don't believe there is any functional impact, so is there any other reason not to use the public access images in these files?

Thanks!