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.
It might be where you live. When I visited So Cal for example, I was amazed to see Starbucks and McDonald’s and gas stations with super long lines… doesn’t happen at all in other places I have lived. Maybe short lines at a coffee shop at very busy times of day.
Another aspect is that businesses, for capitalism reasons, have majorly skimped on employees in the last few years. They’re trying to get away with the least staff possible purely for profitability. It’s pretty vile… customers get worse service, employees get burnt out, and execs and owners just don’t care because they feel like people don’t have a choice. McDonald’s, for instance, operates with far fewer staff at once than they did 20-30 years ago.