^^^
you do realize that pinball machines were/are left on for hours (and sometimes days) on end?
you do realize that the power to your machine is running through a very inexpensive breaker in your breaker box?
you do realize that your "rugged aluminum box with internal breaker" really isn't buying you anything (it is just a fancy power strip, with a "breaker" that is no more robust than the ones you are denigrating)?
you do realize that your "rugged aluminum..." is plugged into an outlet that costs a few bucks at most?
i could go on... do you have everything in your house connected in this manner?