I find waiting for things physically exhausting. Waiting in lines, waiting sitting in a room, waiting on friends to decide what they want to eat, walking really slowly with an elderly relative: I find it all physically exhausting even though very little physical energy is required.
Oh yeah for me it’s like I’ve allocated this much time and resource to something and having those estimations extend indefinitely everytime my estimation’s wrong. Like even if I know it’s a 30 minute wait, my brain only allocates 30 minutes of waiting, if that gets extended I already went through with what I’m willing to allocate :P