In my personal view this is a good thing. I was in the early access to DALLE and without fail any searches for CEO or executive would return exclusively white people. Searches for low skilled jobs would return minorities. Surely such an obviously biased AI that is only going to get more popular should be steered away from this?
I would make that same complaint about any forcible changes to prompts, but it is actually even worse in the case. It is a concession to the ruling political regime of the United States, which will be applied worldwide, even to users who don't share our politics. Imagine if China had made the first great text-to-image generator, but it would automatically append keywords like "heterosexual" in order to prevent images that clash with Chinese culture. I don't think Americans would be too happy about that.