Well, quite. You're not a professional educator or diagnositian. Someone who went into the field of education who then proceeds to resent everyone who desires education is what is so alien to me.
Ah, that makes more sense. But I'd still hold out hope that the writer might enjoy talking about teaching or about grammar but not talking about the sort of things they're complaining about. (And the reason it being rude to ask is not because it's bad to talk about the topic, but "asking for professional advice" for most professions NOT really talking about it, whereas "do you do X a lot", while perhaps overused, is still a reasonable conversation starter)
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