Parents who think they need this are bad parents and bad citizens.
Someone pointed out that every single one of these laws in spirit does not need the website to verify and block the user. There is no need for complicated schemes of all websites implementing complex screening software and storing all our IDs. The website could report a single string saying if there is adult content and software the parent or authoritarian governments ISP has installed on the device could block it.
But protecting children isn't the point
If most of voting age parents want this, then what prevents them from enforcing it on their children. Why do they have to rely on government to be the parent. Maybe those parent should not have been parents in the first place if they need government to step in to raise their children.