I think it has a lot to do with disposition and convenience. I'm lazy, and I don't like to drive if I can help it. But I live near enough to public transportation that we'll spontaneously decide to hop on the subway and grab dinner on the waterfront.
It's not the money that's preventing us from hopping in the car to go to some new beach for dinner, it's the convenience.
Perhaps microwaving for significantly longer, at a low power level, would be safer and result in higher success/yield?