Can you elaborate on what you mean by "bullshit mythmaking"? I'm not familiar with that turn of phrase.
Put another way, why have I seen many very good female programmers trapped in lower paying positions like QA and X-Analyst (but doing legit programming as their job) when there are men who are shitty programmers making 50% more and in a social position that gives them license to condescend to these women?
In either case, agreed that changing the popular mythos is absolutely a prerequisite to resolving the inequity.
I don't think software-development is unique in that respect though, humans tend to want to take a messy reality and make simpler stories with fewer and simpler characters.