I'm guessing you are thinking about things like addictive social media and the efforts to keep kids from overusing it, and the idea is if there were strong privacy laws it would be harder or impossible to implement the most addictive features of those sites?
However harms based on sites having lots of personal data on their users are only part of what many people are concerned about. There are various categories of apps and sites that are legally required to not sell to/serve children. There are also things that are not illegal but the majority of research finds is bad for young children, so apps and sites may want to keep young children out unless a parent approves. Privacy laws don't help with any of that.
However harms based on sites having lots of personal data on their users are only part of what many people are concerned about. There are various categories of apps and sites that are legally required to not sell to/serve children. There are also things that are not illegal but the majority of research finds is bad for young children, so apps and sites may want to keep young children out unless a parent approves. Privacy laws don't help with any of that.