We say that questions asking for legal advice are off-topic (rightly so). I always thought this meant "what should I do in this situation?" (which may also be too localized), or "what exactly does this clause of an employment contract mean", and stuff like that -- specialized questions for which you really need to consult a lawyer, not anonymous people on the internet.
So I was surprised by the close reason for Illegal interview/application questions in the UK? . Yes the question should be closed for asking two different questions in one, but after separation I would expect both questions to be appropriate. This seems to be a general question about hiring/interview limitations in the UK; if it were instead asking what the illegal questions are in the US, I don't think anybody would have blinked.
So what am I missing? What makes this question off-topic as a legal question, and should we then apply the same metric to any question that asks about things you can't ask/do in the hiring process?
Note: I don't have a horse in this race; I'm just puzzled and asking for clarification.