Which of course destroys the actual switch
Then because it is top heavy it falls out so you start then pull it out which means if you have to shut down in a hurry you have to find the screwdriver in the tools bin shove it in the hole to shut down the mower.
Not the smartest thing to be doing with a very dangerous piece of equipment
And if you think mowers are not dangerous, pop down to the local emergency ward of your local hospital and have a chat to the triarge nurse .