Every single right you have can be taken away by the justification of it will protect children or it is wrong because of something some person wrote in a religious text.
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.
Why does that mean people who don't want this law's privacy gets to be invaded? How is this not those parents' responsibility to ensure their child doesn't go on those sites they don't like?
The fact of me being a parent is non of your concern I would say.
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.