I think a big part of it is platforms not wanting to get listed as "adult content" by organizations maintaining filter lists. Facebook wants absolutely everyon

I think a big part of it is platforms not wanting to get listed as "adult content" by organizations maintaining filter lists. Facebook wants absolutely everyone to use Instagram, especially teenagers. They almost launched Instagram for kids under 13, whom social media companies in the US are forbidden from offering their standard products to. I've seen public wifi filters class reddit as "adult".