Apart from a few decades of the 20th century, it has been taken for granted that girls and boys are different. The Victorian commission pinpointed separate but equal strengths. Today scientific research also highlights gender differences. But individuals come with a range of characteristics.
The point is not, as feminists used to argue, that boys and girls are born the same, but that no child should be held back from their aspirations.
That goes for boys who want to sing in the choir as well as for girls who aim to be rocket scientists.