That's pretty much what the entire article is about - the risks of taking this before a court or even just bringing it up internally in a company; the potential damage to reputation, career and wellbeing can outweigh the slim possibility of justice (and it is a slim one, because often there are no witnesses). Just talking about this would be a huge decision for anyone, let alone bringing charges against a former manager or colleague. Here are some of the bits you seem to have missed:
They worry that they will be seen as liabilities for the rest of their career.
Realistically, only bad things happen to the whistleblower.
People who don’t believe you will consider you an enemy and call you “traitor” or “attention whore,” but never whistleblower, and people who haven’t bothered to research enough to form an opinion will call you a “liability.”
People are going to pass you over for jobs because they think you might stir up trouble.
Courts of law are not the solution to this (or at least not the only solution), a massive change in the way we view women in the workplace, and a recognition that there is a problem with sexism in tech are the solution. That starts with taking accounts like this seriously and listening to what people have to say, not dismissing them with tired excuses about taking it to the police instead of boring you with it.