While I agree that all cases of sexual harassment is bad, there should still be different degrees of just how terrible. Just like there are degrees of harassment, bullying and any other crimes. There may also be factors that will make a case far more serious.
Coworker A sending a picture of genitalia will be a minor thing compared to the Harvey Weinsteins who abuse their power in order to get their way with the women that are in their employ. To be absolute and consider both issues equally means that the worst cases will actually be devaluated.