I mean, the real issue is that it's entirely subjective. Once they confirmed that the material in question was in fact legal, that should have been the end of it. I already think that regulating hentai is dumb, but taking issue with real women's bodies like Australia did?
I mean seriously, what's the point of drawing the line at 18, if you're gonna ignore the line because women don't magically shapeshift on their 18th birthday? The whole premise of legality is on age, not appearance.
Honestly, while there was a lot of progress on calling out abuse and exploitation, everything around teenagers has gotten so charged that not vocally decrying anything that is even in the neighborhood is enough to get piled on. Pornhub now pretends the teen category doesn't exist in their research analytics, most search engines block porn searches for teen, even though it's always referred to legal 18/19 year olds (or late twenties depending on how petite they are).
Like, I don't miss "creepy uncles" being a thing that everyone brushed off, but this hair trigger response is way too much.