I stopped carrying keys around about two years ago.  Carrying keys stresses me out.  First, keys weigh me down.  I don't like the bulkiness of keys in my pocket. But metaphorically the weight is much greater.  Keys to me feel limiting.  Rather than feeling that keys open doors, I actually feel more stress that I'm (i) being locked out of something in the first place; and (ii) my keys are finite.  My world is much greater than the keys that I carry so I would prefer just not to carry any at all.  If I want access then I'll figure out a better system than lugging a bulky set of metal around in my pocket.