Hot weather dressing.

WaPo offers up advice about how to dress for the office when it's really hot out. Must a woman wear nylons? Must a man wear a tie? I don't understand the questions. Nylons and ties only seem required in the first place in the sort of office that is going to be very well air conditioned in the summer. Presumably, if you're driving in to work, your car is well air conditioned too. So what relevance is there to the weather? Let's assume you have to walk a substantial distance at some point or use some train or bus that isn't well air conditioned. Isn't it perfectly easy to carry your hosiery/tie and quickly put it on when you get to the office? Maybe my life is too easy out here in Madison, Wisconsin, but to me these seem like nonproblems.