Except that: 1. difficulty calculations only happen every 2 weeks - so this would result in a comically bad UX where your transactions confirm dramatically fas

Except that: 1. difficulty calculations only happen every 2 weeks - so this would result in a comically bad UX where your transactions confirm dramatically faster or slower depending on the weather 2. the network security provided from mining using electricity is directly related to the opportunity cost of using that electricity for mining. If energy was otherwise going to be thrown away, the security provided from mining using that energy is zero.