Because it's not relevant. Job positions aren't coin flips. There are more men who work as welders, there are more women that work in nursing, for example.
Over the last few years there's been a marked increase in women working on construction sites.
Why don't these "equal outcome" groups make a fuss about that? What about trying to get more men into nursing or day care?
In other words, in the popular view, it's not discrimination if it happens against men. It's justice.
Note that I'm not advocating for or against this view.
> Why don't these "equal outcome" groups make a fuss about that? What about trying to get more men into nursing or day care?
They do. They are.