fighting the battle far earlier and getting girls interested young so that they choose to enter these fields at a higher rate than they currently are doing.
It's your time and energy if you want to do that, but you should probably recognize you're still treating women differently in that case.
Why do you want to pressure or influence people to do something that all the evidence indicates most of them aren't particularly interested in doing?
Shouldn't we be pleased that in an advanced society people have the opportunity to seek out and perform the work they find interesting and fulfilling?