Are we to assume that the people at the EFF haven't heard of how European nations, like Denmark, are building government infrastructure to verify your age without disclosing sensitive information?

Are we also at assume that the EFF fail to see the similarity of age-gating porn websites and age-gating entrance to strip clubs?

That doesn't seem likely to me, and I find it way more likely that the EFF is purposefully excluding the best argument against their chosen position.