A bit worrying that this is ambiguous, but I would say that it is largely because of the position of power. Like someone mentioned earlier, "hire" and "hit on" should never be in the same sentence.

And as a common courtesy I believe people shouldn't be hitting on their co-workers in the workplace in the first place. That makes everyone uncomfortable.

But there is this https://www.popsugar.com/career/More-Couples-Meet-Work-Than-...

I'm not a woman, but I feel the line is a bit blurry depending on the scenario. If it's genuinely unclear what this person is coming to you for, then I think this is a reasonable message to send. If you're already half way through hiring somebody, then it's clearly inappropriate.

Not propositioning people you're attracted to is a sure way to be alone in life; I tend to think it's fine as long as it doesn't interfere with your professional obligations.