Sir, if only your surroundings and experiences affect your brain, men and women will still have distinct differences. Why? Well, because hormones. Hormones will affect girls and boys in distinct different ways. So, even if, though unlikely, women and men are different in no other way brain-wise, they’ll ALWAYS be distinctly different.
It’s possible to get reputable sources for a lot of things. For example, atheists have reputable sources against God, and Christians, like me, use reputable sources for God, yet only one of us can ever be right.
Here’s my source, since you do ask for it. It’s reputable.
https://stanmed.stanford.edu/how-mens-and-womens-brains-are-different/