Among the professions in general, you said, the difference is supposed to be stark. This is false since there is no general difference between the average profession and CS. Second thing is that we're stuck in the 1960. This is also false since all professions has on average a worse gender segregation in 2018 than in 1960, which includes the STEM fields. The third would be the conclusion that toxic culture causing segregated work environment is a tech-specific problem. Every report (including government issued ones) that I have read describe similar problems in profession with similar or greater gender imbalance than CS. The service industry especially has many horror stories being printed in news with rather regular intervals.