The spanish shut down in mid day due to heat, and stay up late to take advantage of cooler nights. We can't expect every society to just emulate the spanish (who, probably unrelated to their mid day shut down, are not in an excellent financial position now.)

All your suggestions are lots less convenient. Carrying clothes and deoderant, having to go early and sponge bathe mtself, or putting other people off when they smell me. I shouldnt have to do those for a few blocks walk like to and from lunch.