If you are right that womens’ brains cannot handle Gemara, then why are there so many female lawyers? Today, half of all law school graduates are women, and these women have to handle complex trial cases, read briefs, and argue in front of courts. Would you really say they are inferior to men as well, even though they graduate at the same rate and do the same exact tasks?
Google “shatter the ceiling harvard law” if you believe that.