Well obviously there are going to be a few people who have different requirements but the majority don't. Why do people have to take things so personally?
I live in a country which has far more hot weather than the UK does, and I no-one I know is a super sweater, so I imagine the majority of people on MN aren't either.
As I have already pointed out, there are advisory segments on TV here telling people they don't need to wash clothes as often as they think they do - so I imagine they are also catering to the majority. But no doubt if you lived here you would deem it necessary to write and complain. Incidentally, I probably could wear my socks more than once as my feet don't sweat much either, I just think that as they have been encased in shoes for most of the day they could do with a wash - and if you bothered to actually read this thread you would see that nearly every post mentions daily changing of socks.