exactly. I dont agree with you that women have "never been" discriminated against, but I do agree that vocational fields are not homogeneously populated (and that is not the result of discrimination).
* I dont see very many women police officers
* (this was mentioned on HN last week) not very many oil-rig workers are women
* I dont see many heterosexual men working as hair dressers or bridal shop/wedding planners/fashion designers/makeup artists ("this is clearly a glass door organized by the Gay Male Establishment to prevent heterosexual men from breaking into this field. Such abuse of privilege" /s).
* I don't see many women working as bouncers at night clubs
* I don't see many women working as commercial pilots.
But you know, for all the "I don't see"'s , when I do see one that defies the norm, I dont think much of it. They're people just like anyone else, free to pursue whatever they want. But it's not automatically discrimination when groups of people gravitate to certain fields.