Right, it should be "men and women were equally likely to seek political office and ..." to account for the sexes seeming to prefer different occupations.
Sorry, I forgot to mention that in my comment. In any case, I think there are many countries where the lower number of women in parliament is largely/partially due to systemic/social factors, as opposed to biological factors.
EDIT: To support my position, here are some non-biological factors which affect the proportion of female politicians: https://en.wikipedia.org/wiki/Women_in_government#Challenges...