Earlier quoted context omitted.
So you'd be in favor of the question "What's the best regular expression for parsing HTML?"
Why not? Like it or not, regexes are able to parse a limited subset of HTML. By explaining why they only can parse this small subset is a great teaching opportunity on Chomsky Hierarchies. And the people searching for it might learn that XML parsers exist. By actually giving an answer to the question (after saying the above of course) you might be helping thousands of people parse very simple HTML when they're in a h…
Besides, I concede that "helping thousands of people parse very simple HTML when they're in a hurry" has its merit, but IMHO that's also how you end up debugging a production bug at 3am while losing faith in your fellow developers and humanity, so I'm not sure if it's a net plus. YMMV.