Because of legal loopholes I’m certain. They aren’t technically creating images of someone that is legally a minor, despite the fact that those extremely innocent people happen to be older than 18 y/o physically, while being a bit younger mentally. The law is generally extremely slow to close such loopholes, and for good reason. You’re seeing in real time what happens when someone tries to close all the loopholes that they care about. Drumpf just happens to care about loopholes that no one except fascist billionaires care about.