The question is why would anyone who eats rice regularly NOT buy a rice machine? It cooks the rice far better than a 'saucepan'/pot, and it requires no attention at all, you can just press the button and wait for it to beep rather than having to carefully time things.

You don't have to correctly judge the temperature (which can be different on every element of a stove) or the time vs water content/etc. You don't have to stop whatever other cooking you are doing when it finishes. And you don't have to worry about how different types of rice have different cooking times and things like that, you just press the buttons and wait.

I own almost no cooking appliances at all, but I do own and love a rice cooker.