Don’t muddy the water: you were talking specifically about chick-fil-A, even though I was using it as a generic example of a product people might get attached to. The ‘separate the art from the artist’ crowd would have you ignore any unpleasantness on the part of the producer, so long as the product is enjoyable in isolation - and hold it a moral failing not to do so.
And your entire point was that you couldn’t be consistent because you werne’t all-knowing; not knowing the character of your 800-year-old artist is no different in this instance from not knowing the future: to perfectly apply the principle would require full knowledge of every situation where it could possibly apply (which is of course impossible). This does not, I contend, render the principle, or attempts to apply it as consistently as your knowledge allows, worthless.