I think there's plenty of utility. People can express opinions that they hold honestly but would fear social retribution for if it could be tied back to them publicly. For example, any political opinion that I hold that's modestly center or right of center I would not appreciate being attached to my name online since people are completely incapable of nuance or compartmentalization.
If you wouldn’t make a political statement in a town hall setting where you’re going to show ID, then you probably shouldn’t say it on the internet.
But keep in mind that these laws don’t result in your identity being public. They will ultimately result in the sites you’re posting on know that you’re an enumerated individual. The ultimate benefit as I see it is removing outsized leverage over public opinion by botting likes on your statement or otherwise operating tons of accounts. It should also eliminate threats of violence from the digital public square, since building a prosecution pipeline against those would be easy to do. Same with child grooming, but I’ll acknowledge there’s a way to make that argument in a glib way, as an excuse to realize some of the other goals. It is a real problem though.