Yes! That makes sense. Also, likely the law says it's required for this reason too. So obviously there is no problem with turning the machine the key.It's there to be able to kill the machine without taking your hands off the handle bars. like if it's on top of you or you need to maintain your grip on the brakes, etc. The only time it gets used on my machine is if my kids play with it when they are sitting on it. Then I've gotta figure out why it doesn't want to start. My step son is notorious for hitting it on his machine. then he can't figure out why it wont start.