An automatic rifle has almost no positive use to it. This software is not like that and more like something that makes everyone better at a skill, uniformly raising the artistic talent floor. The large majority benefit but some would use their new earned skill for bad. It would be like denying literacy and the printing press because there will always be some people who use it to write very bad distressing things, manipulate more easily en masse and spread misinformation.
They're not refusing to distribute the software, they're restricting it for NSFW uses, of which the danger is more significant than any positive uses - much like automatic fire.
"restricting it for NSFW", according to whose standard? "which the danger", like what?
I'm glad this technology is finally out in the open where people like you no longer have a say in how it is used. The sooner people accept its existence (like they have with Photoshop), the better off and healthier we'll be as a society.