Sure, and the fact that they haven't voluntarily put guard rails up to stop that is absolutely vile. But my personal definition of "absolutely vile" isn't a valid legal standard. So, the issue is, like I said, how do you come up with a principled approach to making them do it that doesn't have a whole bunch of unintended consequences?
Courts are able or should be able to distinguish "tool that creates an item in the privacy of your home" and "tool that disseminates nonconsensual pornographic picture to wide public". Legal standards with that level or definition are fairly normal.