That isn’t sufficient for the people trying to pass these laws. They’re trying to get the government to enforce parental controls, not the parents. Those types of controls already essentially exist and yet they were deemed insufficient.
This is mostly because these people are not interested in protecting children, but rather shutting down anything they don’t like. The same way they tried to shut down abortion clinics by attempting to hold them to full blown hospital building standards. It wasn’t because it was unsafe, it was a way to harass the clinics they disapproved of.
These were so much better than the radio transmitters. That brief period where cars only had CD players, no AUX or Bluetooth was the worst.