Sorry for being unclear. My point to was that the vast majority of "chivalry" is in no way rooted in real physiological differences while trying to also highlight some small exceptions. Chivalry is mostly crap but also that you shouldn't avoid helping them (or anyone) when it makes sense. You shouldn't treat women any differently than anyone else who is in a similar situation (I do jujitsu so I have good grip strength and have helped both male and female friends open pickle jars as a weird example).

EDIT: I guess what I'm trying to get across is that it's not your gender or ethnicity that makes you treat someone a different way, it's who they are as an individual. I think that the idea of "chivalry" runs generally counter to this.