Well, there is liability, safety, and practicality. I have no desire for a career change, but trying a forklift or city bus or train in a simulator is a fun afternoon. I don't think the city is gonna let me joyride in their equipment, anyways.

You can go over to r/powerwashingporn and see a lot of homeowners renting some equipment for an afternoon, but you don't want them going out to public land and cleaning whatever they want because they might just damage stuff with the wrong chemicals or techniques. I know beaurocracy isn't very fun but nobody wakes up with the sole desire to manufacture red tape for no reason.