Not handwaving away the difficulties facing motivation of war for the US/Taiwan side, I just really dislike the notion that masculinity has anything to do with the effectiveness of a fighting force, the Americans and NATO armies in general rarely boast about masculinity or martial prowess in their propaganda pieces, but rather the hardware pieces that will actually decide the fight.To some extent, but to ignore that there would be a morale mismatch would also be ignoring part of the basic reality on the ground.
Ultimately AR is a fight that will be decided not on Taiwan itself, but whether China can provide sufficient area denial past first island chain such that an intervention from the US side will be extremely costly without a high likelihood of success. Therefore the quality or even quantity of soldiers on Taiwan itself makes little difference in the outcome.
As for area denial, whether China can successfully intercept B-21s loaded with stealthy cruise missiles is a key deciding factor here, otherwise the US will be able to exact a bloody toil on PLAN assets. H-20s will also perform a similar role but for the Chinese side.