To be clear, I don’t think the person is stupid, and I don’t believe I’ve called them stupid. I appreciate the intent to support me, but I also find it a bit of a stretch that answering “is DO_NOT_USE supported” with “no, it’s not supported” must be a consequence of a culture shock. :) But I’m biased so idk.

I didn’t get the impression from the reader that they were a beginner, or someone struggling, or someone who doesn’t “know they’re on the wrong path”. My impression was that a professional came to get an authoritative answer on a level of support of an API, and I tried to provide it.