They also want a reliable way to differentiate between chatbots and real users, because advertising isn't very effective on chatbots. But also, one benefit of ID laws for the government is that it makes court proceedings much faster and cheaper. Sure, they're tracking everyone online, but a lot of that information is locked behind procedure. By just requiring ID to log in they can sidestep the procedures, because they can just ask corporations nicely for ID information and they'll eagerly comply.