I admire your uncomplicated, predictable life.
Sometimes I want to buy something from a guy with the ice cream cart at the park. Sometimes I need to tip a valet, a doorman, a hotel maid, or another service worker. Sometimes I want to buy Girl Scout cookies from the girl with the table on the corner. Sometimes I want to buy something from one of the 35 million Americans without a bank account. Sometimes tow truck drivers take cash only. Many of the late-night restaurants and food carts in my city are cash only.
Some day I'll go cash-free. But my life is not yet that simple.