I understand you don't get it. I'm saying that's partly because you don't have a visceral fear of sexual assault. You also probably don't have much experience with unwanted sexual advances. And you've probably never been sexually harassed. You also may not have experienced being a visibly different minority in a situation where that raises your risk of unpleasantness or violence.
I don't think the jokes themselves were scary. I doubt Adira did either. But sexualization of a professional environment can be scary. So we are finally starting to say that it's not allowed at tech conferences.