There are a couple of significant differences between basing some game stuff on Lovecraft's work despite his racism and dealing with someone like JK Rowling.
1. The Cthulhu Mythos isn't just about Lovecraft's work - it's based on a broader base of authors with a broader mix of personal views and failings. So it's not just tied to a pretty extreme racist.
2. Lovecraft is dead. He can't materially benefit from anything done to further the fascinating weirdness of his creation. By comparison, JK Rowling has actually taunted people on twitter about still being enriched by her creation.
And that makes it pretty clear that, at the very least, economic interaction with her creation does benefit her. She gets paid
a lot for her creation and will as long as there's a big market for it. And when she wasn't being such an idiot about transgender women, that wasn't a problem. She's one of very few people who donated her way down from billionaire to millionaire status, mostly for health care and poverty/economic equality causes. Her response to opposition to her views has led her to be increasingly mean and extreme. So this isn't a case of someone making a relatively minor blunder - she's going full monty on the topic.
(and I see I'm partly ninjaed)