A) I feel there is an implicit "we would like to see more diversity in female fighting game archetypes" being said when people complain about a "vagina tax". At least as far as I can see. If the only way to have higher health in a Capcom game is to be a bruiser or a more midrange character, maybe people just want more females who are bruisers or midrange characters rather than speedy, small and lithe.
B) I'm sure for some/many characters, people feel their toolset doesn't justify their low health. I mean someone just argued that Chun-Li's health was too low at one point which I think means they recognize the relationship between toolset and health but still feel Chun-Li's was too low for the toolset she has.