Famous people are still people, and they still have opinions. Opinions you might not even agree with. Are we to exclude the famous from speaking their opinions? I would love to see how that would work, both legally and as kind of a sci-fi premise. Actors interviewed on late night shows offering only the blandest of reactions to what is said. No longer are musicians able to fund charities with their wealth, since donations are speech, as per the Supreme Court. Court battles are waged over how wealthy must be or how many Google hits are found for their name before someone is too famous to have opinions.
It lacks laser-guns and aliens, but as a very dry, Burgess-like exploration of government policy as a near-future sci-fi, it might be workable.
First, my response was denying that the description was of a phenomenon which was in any way novel as the upthread poster claimed, it wasn’t my description.
Second, I don’t read it that way: it was simply describing that, Rowling achieved fame and then, having achieved it, used it to sell certain ideas. There was no suggestion that it was planned in advance as a strategy, or even that that use was especially prominent among her uses of the fame.
People building fame in art and using that fame to advocate for causes, including the cause of preserving the marginalization of particular marginalized communities, is not novel.