The idea that femininity resides in being smaller/weaker/less than/whatever sucks. Femininity is not passivity, submission, or fragility, those are not where the feminine resides.
There’s nothing wrong with being smaller or weaker or what have you, but like that’s not a healthy place to place your ideas of what makes you feminine if you want to feel feminine (or like even if you don’t, cause like everybody’s smaller/weaker/etc than somebody)