"Why can't it just be flagged "adult" or something, and you can then opt-in on your device to seeing apps flagged as such?"
Presumably they think they will make more money by excluding those apps for now.
"Why does Apple think it is suitable to make these decisions on your behalf, iDevice users?"
Because that's the way stores work. The owner of the store decides what goods to sell in his store. A clothes designer has no guarantees that Neiman Marcus or Nordstrom's or Macy's or Walmart will carry any or all of their products.
Presumably they think they will make more money by excluding those apps for now.
"Why does Apple think it is suitable to make these decisions on your behalf, iDevice users?"
Because that's the way stores work. The owner of the store decides what goods to sell in his store. A clothes designer has no guarantees that Neiman Marcus or Nordstrom's or Macy's or Walmart will carry any or all of their products.
"Are you happy with this?"
I'm happy the iOS app store is curated, yes.