"instinct" is basically a bullshit term which allows them to judge others based on prejudices
OP wasn't 'judging' this man. She was making a decision about herself, her preference, her safety. He is a man she doesn't know. That is a fact, not a personal judgement.
It isn't prejudice to say that the vast majority of violent and sexual crime is committed by men.
It isn't prejudice to say that we cannot know which men are rapists, or likely to commit sexual assault, or harrassment (of the common, everyday kind - lucky you if you're a woman who hasn't experienced that) until it's too late.
Therefore we avoid getting into situations where we would be at risk from a man who did turn out to be a rapist, or a pest, or just make us feel uncomfortable, or waste our time.
We owe random men nothing.
Instinct is not bullshit. It is unconscious risk-assessment based upon accumulated experience.
You ignore yours if you want to.