I think this again comes back to the idea of thinking of it as some sort of digital town square.

We don't seem to have an issue with the government requiring businesses to check ID for alcohol, tobacco, porn (in the physical world), and firearms. Movie theaters check ID for rated R movies if you appear to be under 17. In fact, a lot of online retailers of alcohol and tobacco now require ID to be verified at purchase instead of at delivery.

Facebook/Twitter/TikTok/etc are not the digital town square; the most charitable analogy for them is they they are merchants in the town square. And the rules should still apply to them.