> while ignoring the fact that these laws provide tools allowing parents to do just that

These tools are called "parental controls" and already exist - we don't need laws to compel their production.

...unless, of course, the true aim is to use this as a beachhead for further expansion of privacy-violating requirements.

You write this off as a "slippery-slope" argument, but given that there are already quite a few tools that do what this law aims for, what's the point?

Sometimes it's good to standardize things. Existing parental controls are a hot mess and they mostly work by completely blocking sites/apps, not giving them an age category.

Because the tools don't work, and are too fragmentary and burdensome.

Would you prefer to inform each movie theater in town which movies your child is permitted to watch? Or just rely on the rating system that applies to most movies and is honored by most theatres?

Parents want one setting that says "this is a child" and then expect online platforms to respond appropriately. As we expect and mostly have in the real world.

If parents want that solution, then the proper thing is for someone to build that solution and make a fortune selling it, IMO.

> Parents want one setting that says "this is a child" and then expect online platforms to respond appropriately.

This law does not do that. It breaks the age of children into several buckets so that platforms, websites, and advertisers can target specific demographics. They won't "respond appropriately" they'll just use this data point as another way to improve how they exploit children online. Now every pedo with a website can tell how old the kid is so they can better adjust their grooming for that age bracket.