So. LA Weekly, liberal weekly rag like in every mazor city, has CloudFlare checking for "Are You Human" ... On Their RSS Feed page.
I had to look in the logs to find the 403 (because that was easier than loading the page, which I had to do anyway to find the Actual problem).
Well, no ... my NextCloud News + AndroidApp and any other reader are, in fact, Not a human behind a browser. Fancy that.