If we ignore the fact that the amount of force that one must generate to open a door is so far below the threshold of intense exertion for any able-bodied adult that it is pretty much irrelevant, there is still a statistical problem with this argument.Buretsu said:All I'm saying is that the world works best when everybody does what their best at, and since men are GENERALLY stronger than women, a task which requires physical strength, such as opening a door, is most efficiently performed by a man.
As for pulling out chairs, well, that's something one generally does with someone they're on a date with, or a female acquaintance they might like to go on a date with, not usually with strangers as is often the case with the opening of doors.
You put the term "GENERALLY" in all caps, presumably so that nobody could mistake that you were saying that all men are stronger than all women, yes? To restate that, if on average men are stronger than women that does not imply that for any two people chosen at random we can expect that if person A is a man and person B is a woman, then A will always be stronger than B. This is the more likely result, for sure, but not by all that much. There are plenty of predictors on a person's strength other than gender.
If you only take gender into account when deciding if someone needs help with physical tasks, then you are elevating this one predictor to an unreasonable weight, when multiple other relevant factors can be estimated at a glance. The most important being muscle mass, to which strength is more or less proportional.
So, you say that women shouldn't have to do these things themselves, whereas your reasoning above only supports the idea that the weak shouldn't have to do these things for themselves. Thus, you're door-opening would be based on whether the receiver of this favour is bigger than you. Again, statistically speaking this will mean that you open more doors for women than men, but you are not now making the decision based on gender, and hence not sexist.