I alway wondered about heroine vigilantes or super-heroines....The men are built as fuck but someone like Power Girl or Wonder Woman is a skinny little escort looking girl...HOW DOES THAT MAKE ANY SENSE!!
I always imagined Kara being fit and toned or fit with a muscular build like wonderwoman or powergirl (obviously with a more normal sized rack) so when people look at her they go "damn she's fit but not all Female bodybuilder like. Because if kryptonians are more advanced than us than they would be more built and fit but not bodybuilder huge. Clark is big because of genetics. On Earth people come in all shapes so on krypton this is the same deal but nobody is out of shape. Non is a hell of a lot bigger than Kal-El but has less experience with powers thanks to Kal's adoption.