"There is lots of research out there that shows women are just as interested in being entrepreneurs as men"

Which is irrelevant. The percentage that are "interested" and the percentage that actually go and start a corporation are miles apart, so there's virtually nothing to be gleaned from studies about interest. Who starts real world businesses, not wannabe businesses that only exist as concepts in their heads?

There's reams of evidence showing sizeable sex differences in how risk gets analyzed, how risk is perceived, and a pretty vast gulf in risk tolerance between men and women.  Nearly equal rates of interest are almost virtually guaranteed to produce fewer women that pull that trigger and actually start those businesses, given what we measure about how they perceive risk. Just look at where women collect in entrepreneurship - small, service oriented businesses that have little to no risk. They probably face *some* discrimination, but the vast bulk of their issue is engagement.