Changing a tube out on a bike is the easiest thing to do next to oiling the chain.
My wife and I taught a bike maintenance class and she was the flat tire demonstrator. She could change out a tube only using tire levers to take the tire off the rim. She then demonstrated how to mount the tire without using tools.
She hit an dangerous storm grate on a fast decent while riding to work one morning. There were pinch flats in both the front and rear wheels. She was close enough to her office to walk there, and she patched the tires while eating lunch.
Changing or patching a tube is easy to learn, and should be in every cyclist skill set, especially if you ride further than walking distance from home.