Do you believe that women and men are naturally subs and Doms?
Yes. Dominants and submissives are born, not made. One can learn to become a better Dom or sub, but one cannot manufacture a Dom or sub out of whole cloth.
Depends a little on how you parse the original question. If the question is are (women and men) naturally (subs and doms) then yep. Though very often old-school mentored doms often had to do their “apprenticeships” as subs.
If the question is are (women natural subs) and (men natural doms) then no. Strong social assumptions tend to stifle and mask women who are doms and men who are subs. But sort of by-definition “socialized” ≠ “naturally.”