How did men benefit? Did all men benefit? Were the men also constrained by cultural roles that served to benefit women?

Men were permitted a wider range of roles, and a wider range of roles that personally benefitted them and fit with their desires, than women were.

You seem to be thinking "well, both men and women faced some restrictions, so there was no substantial difference between the restrictions placed on them". This is not true; not every "some" is the same.