Along those lines. A friend of the family had a truck line. It seems this small, young lady, wanted a job to drive the truck. However, the driver had to load and unload the truck. So he gave her a 50lb box to load. She couldn't lift it. Then he asked her to chain the truck up with the snow chains. She couldn't lift the chains. Then she cried about not being fair. Well he told her, all his drivers had to do that, not once, but sometimes many times a day. I think my Dad's record on chains was four times on and off in one 14 hour day. Now he wasn't against women drivers, and there are women out there that can lift those loads, but this one couldn't. So she didn't get the job.
Now in my job, as a systems administrator, women do equal work and as far as I know, get equal pay, and equal opertunities for advancement. But the only heavy thing to lift in this job, is brain power.