Washing less is one of the things many try to push and might even make sense for some.
But I don't think I'll be one of them.
I don't think I will judge anybody for wearing their pants a week between changes in a office job.
Or wearing their dress shirts twice, thrice or so.
You wear underwear, you wear undershirts, you don't do much while wearing them, sure.
I wash my winter jacket like - once every two months tops?
But I sweat like crazy even in winter.
I currently change T-Shirts 3 times a day because I sweat so much - I drink a gallon or more a day with this weather.
My dark unterpants have those white salt outlines after I wear them a day because I sweat so much - I can't wear those more than 24h.
If you sweat less by nature - yeah you might get away with one shirt a day?
What I think many could improve without sacrificing cleaning their clothes is when and how they wash.
I wash a load of shirts and underwear every 2 weeks - that's a full load then. I change my towels weekly and wash a load every 4 weeks - that's a full load then.
I wash my towels and beeding in hot.
My shirts and underwear - because I change them so damn frequently - go on a warm, but long wash with oxygen bleach. Sure a hot wash would be more hygenic - but between the EU wash times, and the dryer/sun, I never had ANYTHING start smelling much even after sweating it through.
As I have said before: Saving the climate by being more mindful of what you buy, how you use it and how you take care of it is something YOU CAN DEMAND of people today.
I don't ask ANYBODY to not change their clothing frequently. I don't ask anybody to get rid of their vintage machines. I don't ask anybody to skip all hot washes.
But I do ask that maybe washing 4 once worn shirts in a TL with a full tub of water should not be done so that maybe when I turn 65 I can still enjoy a nice hot bath once a week without feeling to guilty.
Not washing/changing your clothing FOR weeks - yeah no that is to far.