And differences in average upper body strength between men and women are used to deny women work in jobs that involve lifting things. It can be done in a misogynist way like a blanket ban, or it can be done in a more knowledge-seeking way like requiring a physical therapist to evaluate lifting ability as part of the hiring process and only accepting candidates that can safely lift 50 pounds or whatever. There are structural incentives for the blanket ban in the form of the extra cost, time, and overhead management of the physical therapist evaluation program, but it has benefits of ruling out unusually unfit men who would likely get injured on the job as well as expanding the candidate pool to include unusually fit women.

I don't know what the equivalent to a professional evaluation of lifting ability would be to certify someone as SafeToDate.