That does seem like the ideal solution, but sadly a mechanical rocker switch would cost some number of pennies more to implement, hence they haven't. I have a

That does seem like the ideal solution, but sadly a mechanical rocker switch would cost some number of pennies more to implement, hence they haven't. I have a hot water stand-by boiler in my kitchen a $15 outlet switch because the darn thing didn't come with a simple power button. Hardly anything these days does. All of which is to say, the ideal design often conflicts with the consumer's other expressed preference of "lowest price possible, it doesn't matter how many corners are cut and how quickly it dies".