[sdwr]

1000 foot view:

East is old culture + institutions, west is new. Think new york + boston vs LA and SF. The east coast was settled long before cities on the west.

In broad strokes, men look to make something new / upend the existing order, and women fit into existing structures. Mirrors the age-old biological reality - men can concieve at any age, with multiple partners. Women have a limited reproductive window and carry the blood cost of reproduction. Women are more stable as caregivers, men are higher variance.

Not to say it all goes down like that, obv social norms change and people can be whatever they want, but the "bare metal" underlying biology has an impact.