It's drawing a line between saying the government is going to issue an ID and I'm going to provide my actual ID to some third party that I may have even less trust in as part of this system. I think the risks from a security and privacy perspective are very real.
Especially if we're having a discussion around freedom of expression and the overbroad use of site blocking, this would apply not just to pornography sites. This would apply to search sites and to streaming sites. It's hard to reconcile saying there's deep concern about acts of censorship and freedom of expression when we're considering legislation that would actually, in an overbroad way, require some sort of pre-approval to be able to conduct a Google search or watch some streaming services on something like Crave or Netflix.