Women should do women's jobs and activities and Men should do men's jobs and activities.
These include even basic activities like driving.
The only way for either gender to do the other gender's job would be for that individual to meet the standard that is 50% higher than the average standard of the default gender for doing that job.
Not Equal to average, 50% higher.
This makes sure that in crunch situations, their gender-specific tendencies are nullified and their performance remains unaffected.
IQ, EQ and Social Quotient are all relevant scales, among others, for quantifying these.