It is very probably certain that the first commercial success of AI generated content will inevitably be in porn. Hasn’t it always been that way since civilization itself was invented?
Midjourney isn’t trying to be a commercial success. They just want to bring creative power to as many people as possible. Keep the servers scaling to match the rate of userbase growth is the primary financial concern.
Meanwhile, the amount of distributed, user-based effort going into the porn capabilities of Stable Diffusion is staggering. If you feel the world has a shortage of pictures of sexy women, they are collectively working Very Hard on the solution! :D Not disparaging. I’m a horny dude who appreciates pictures of sexy women as much as anyone.