Again, missing the point. We've had thousands of D&D products over the years. And dozens if not hundreds of products, including many which are very well known in the hobby, featuring slavery as a theme. But, zero Mythic Africa. Again, if we've had all this freedom for all this time, to produce any product we could think of, then certainly there should have been a couple that spoke to a Mythic Africa. After all, everything is supposed to be equal right? Free speech and all that.
The claim is that by removing something like slavery, we would lose creativity. Seems to me that creativity hasn't exactly been promoted by including slavery, but rather the opposite - retreading the same tired old tropes and themes over and over again.