Back way back when each family had 4,5 or maybe 6 kids. There wasn’t time for this nonsense and the bullshite of picking a gender would be condemned by everyone.
The libs wanting unlimited tolerance cased this social train wreck. Tolerance of course not for straight Christians.
I think you are on to something here.
Families not so long ago had to grow or raise their own food. There wasn't time to create confusion regarding gender roles. Many tasks required or benefited greatly from a muscular build. Other tasks not so much.
If you tried to accommodate gender dysphoric individuals by mis-assigning responsibilities, productivity could suffer and people could starve.