You are using someone elses propietary technology, you have to deal with their limitations. If you don't like there are endless alternatives.

"Wrongly denied" in this case depends on your point of view, clearly DALL-E didn't want this combination of words created, but you have no right for creation of these prompts.

I'm the last one defending large monolithic corps, but if you go to one and want to be free to do whatever you want you are already starting from a very warped expectation.

I don’t feel like it truly matters since they’ll release it and people will happily fine-tune/train all that safety right back out.

It sounds like a reputation/ethics thing to me. You probably don’t want to be known as the company that freely released a model that gleefully provides images of dismembered bodies (or worse).