Think back on Kavanaugh: what real evidence was there? No place. No day. No time. No witness to the crime aside from the accuser, some decades later. Cited witnesses did not corroberate.
I understand the witness's account was believable to many people. (EDIT: if I knew her, I'd believe her and have empathy for her suffering). But if you step back and look objectively, there wasn't a lot there. And the media pile on was incredible. It was a clear signal to other politicians that the media is willing to not just unleash a mob, but to be a mob. That surely has a chilling effect.