I suspect it's more a business restriction than a moral one. If OpenAI allows people to make porn with these tools, people will make a ton of it. OpenAI will

I suspect it's more a business restriction than a moral one. If OpenAI allows people to make porn with these tools, people will make a ton of it. OpenAI will become known as "the company that makes the porn-generating AIs," not "the company that keeps pushing the boundaries of AI." Being known as the porn-ai company is bad for business, so they restrict it.