Since Sweden has this handy institution that provide statistics, I have taken a nice look at different professions (recorded as part of tax collections) and their gender distribution.
How do you support the rather extraordinary claim that the technology professions have markedly larger gender imbalance compared to other cognitive non-routine professions? From the data I saw, 2014 numbers placed technology professions around the 70%-30% gender distribution which puts it directly into the majority of professions of any kind.
The two extremes: Fair distribution (40%-60% or closer to 50%/50%) has as group a rather poor 10% of all employed people. Unsurprising, it has about the same number of women and men that works in those professions.
The second extreme are those with 90%-10% or higher, and if I remember right about the top professions in that list, it was topping with midwife nurse (99.7%), nurse with dentist specialization (99.4%) and carpenters that construct floors (99%). Going down from that you got several other specializations of nurses, mechanics, midwifes, construction workers, and kindergarten teachers (94%). You have to travel really far into the list to reach professions with as high gender equality as 70%-30%. To name a few cognitive non-routine professions at the 80%-20%, we got professions like veterinarian, psychologist, librarian, and teacher, all with worse gender distribution than technology professions.