I think you're leaving a major part of the first story. Weinstein was, as I said, very careful around major women stars and did everything he could to make their path to his films as carefree as possible. This makes excellent sense from his standpoint; he needed these women. Some of them - Sarandon, if I remember right - said that they had heard rumors, but his behavior with them strongly contradicted them. That's why so many of the great female stars professed to be shocked at hearing the allegations against him. Weinstein preyed mostly on rising actresses or staffers who had much less in the way of resources to resist and who had every reason to keep their mouths shut. I.e. he wasn't a fool when he went out to harass women.
Woody Allen is different. First, unlike Weinstein, he's a great artist and people want to work with him regardless of the allegations against him. Further, he has steadily denied all the allegations against him and the original criminal investigation came up with pretty much nothing. Sure, there's plenty of reason to be suspicious; I wouldn't let him near my granddaughter if she was an adolescent. But that's not enough to make people publicly shame him, especially since folks in the arts are usually willing to cut great artists some slack. Many of them are not nice people. Their art, however, stands apart from that.