Yes in fact they are.Then why are things "for girls" and things "for boys". There's no gender...
Are boys biologically wired to play with dinosaurs and trucks while girls are biologically wired to wear dresses and play with barbies?
Men tend to be interested in "things" and women tend to be interested in people. That's why more men go into things like science and engineering and women go into teaching and nursing. This is shown in even more "equal" countries, where the divide is even stronger than in rhe US.