I've mentored hundreds of people. As someone who does not think of themselves as a creep, I've had many scenarios where a misinterpretation could make the mentee/employee/student think I was a creep even if I had good intentions. For many of those people, it was the first time they met me so it was probably not clear to them immediately whether I was being creepy or just had an awkward moment. So I think real life is not so straightforward sometimes.
Maybe some specific examples would help. Somebody came in to ask for advice about whether they should be more aggressive in some work situation. I thought about it and remember some advice that a colleague had applied effectively. The advice was widely praised. I said the same advice word-by-word, but after saying it, realized that this advice only works when said by a woman to another woman (the advice itself was something about being empowered as a woman). It sounded a bit awkward / patronizing when coming from me. This person then later complained to another person that I gave a sexist suggestion. Nothing happened of it, but it was really uncomfortable and had they spread it on social media in a bad light, that would have hurt my reputation.
In another case, a subordinate and I were already at slightly adversarial terms (a bit of loss in trust, but nothing too serious at that time). I could tell they were attentively looking to find what I was saying to be erroneous. I had to be particularly careful in those meetings, and had to constantly respond to accusations like "why did you agree with [male]'s idea when I had proposed the same idea a month ago and you rejected it" (when it was obviously a more complex situation and the context for the proposed idea were different). But had I been a bit more casual in our meetings, I am pretty sure she would have found something to complain about loudly.
Basically, "don't be a creep" is not enough and oversimplifies things. You can not be a creep, yet still get into a bad situation if someone else interprets you as a creep, especially in a situation where the relationship is not a strong trusted one. You often have to meet and advise people who don't know your intentions, and an awkward mis-step can be problematic. That's just the unfortunate reality.
Maybe some specific examples would help. Somebody came in to ask for advice about whether they should be more aggressive in some work situation. I thought about it and remember some advice that a colleague had applied effectively. The advice was widely praised. I said the same advice word-by-word, but after saying it, realized that this advice only works when said by a woman to another woman (the advice itself was something about being empowered as a woman). It sounded a bit awkward / patronizing when coming from me. This person then later complained to another person that I gave a sexist suggestion. Nothing happened of it, but it was really uncomfortable and had they spread it on social media in a bad light, that would have hurt my reputation.
In another case, a subordinate and I were already at slightly adversarial terms (a bit of loss in trust, but nothing too serious at that time). I could tell they were attentively looking to find what I was saying to be erroneous. I had to be particularly careful in those meetings, and had to constantly respond to accusations like "why did you agree with [male]'s idea when I had proposed the same idea a month ago and you rejected it" (when it was obviously a more complex situation and the context for the proposed idea were different). But had I been a bit more casual in our meetings, I am pretty sure she would have found something to complain about loudly.
Basically, "don't be a creep" is not enough and oversimplifies things. You can not be a creep, yet still get into a bad situation if someone else interprets you as a creep, especially in a situation where the relationship is not a strong trusted one. You often have to meet and advise people who don't know your intentions, and an awkward mis-step can be problematic. That's just the unfortunate reality.