Not sure what point you think you are making or what point you think I was making?
I was not suggesting that equal number of women and men do these kinds of jobs. Part of the motivation in writing this article was to suggest that jobs can be made to be more accomodating so as to increase the number of women doing them. Do I think there will ever be 50% women doing these kinds of jobs? Absolutely not, and that isn't the point either.
There are differences between men and women, but I think society and gender roles push for larger gender differences than would be natural in a society more open minded about men and women making untraditional choices.
Both in the armed forces and the police we have managed to push up the number of women and in my experience that has given positive results. 30% of Norwegian soldiers are women and about 35% of Norwegian police.
In kindergarden/pre-school we have about 10% men and working to get it up to 20%. 10% of nurses are currently men, but in number of students in nursing has 17% men so this is expected to rise. We have only 2.5% women as plumbers today, but out of current apprentices 6% are women. What this is showing is that with dedicated work one can in fact improve inequalty. The present situation is by no means locked in and set in stone.
I don't know what you argument is exactly? Do you want to defend the status quo? Are you upset that more women are entering professions they have normally not worked in? How about the other way around? Does it bother you that more men are working with children or work as nurses, given that it is a "women's job"?