Pretend for a second that fusion did have a net positive energy generation design. Ok, fantastic. How do you intend to fuel the fucking thing. Cost to weight of fusion fuel is amoung some of the most costly shit on the planet. It's also not just rare, but a bitch to produce meaning there's a good chance your plant is gonna be sitting empty and cold for periods when your fuel is still waiting to fucking exist. God these people are fucking idiots.