Similarly in the case of PyCon: joke was crap, someone called it out. Instead of an apology and admission that it shouldn't have happened, two people lost their jobs, and a lot of whistleblowers will be discouraged from speaking out. All because people think their freedom of joke making is more important than the likelihood a woman would feel welcome.
People do know those aren't complaints about direct harassment – just about a lot of individually tiny things that, once taken together, breed an atmosphere that encourages harassment and discourages participation. And sure, some women can deal with that – but they shouldn't have.
Also, a dong joke wouldn't be an issue in a perfect world, but we're not living in one.