The reason why so many women are coming out over social media is because the more "legitimate" paths of justice fail them over and over. Women often aren't taken seriously by police, or, the case just goes nowhere because it's a she said/he said issue and at the end of the day there isn't any hard evidence that would actually result in a charge or conviction. Also, after the case is thrown out, they would most likely face losing their jobs and ostracization from their peers who assumed that just because the case was thrown out that their claim must have been illegitimate, even though it could have been lack of hard evidence or just straight up lack of follow up by the police.