Far east and shlishi – it says a woman doesn’t have daas. Daas is not exactly intellect. We know there are some women who are more intellectual than many men and vice versa, so we know that’s not true. Daas, rather, means a strictly logical approach. Women, in general, are more emotionally oriented creatures than men. Thus, Chazal say that since halacha and the Talmud should be dissected with a purely logical approach, it is unbefitting of an emotionally thinking person to delve into such matters.
This also fits what we scientifically know about male and female biological systems. Women are more prone to hormonal mood swings than men are. Women are also more inclined to naturally feel compassion and are better at detecting the emotional dispositions of other people than men. This can also influence their judgement on minute hairsplitting diyunim in learning. They’re built for a different purpose, and should therefore use their strengths to accomplish the intention that they were created for, not the intention that we were created for.
Just like a lion can’t chew hay, so too can a buffalo not hunt gazelle. It doesn’t make the buffalo worse, it’s just different. If a buffalo tries to act like a lion it won’t succeed, and even if it appears to be a lion because it joins the lion pride in gnawing on the bones of the downed gazelle, it will never become a successful hunter.