Perhaps for the consumer, not for the energy providers
What costs more? Gas or wind? Oil or solar? Coal or wave?
There’s a premium charged for new technology, sure. To cover R&D costs, new tooling, etc, but once the machinery is made, the fuel is essentially free. The wind blows itself, the sun has its own fuel, the tides move freely
Energy arbitrarily costs more because those that sell it have decided it costs more. Aka corporate greed, which is what this post is complaining about in the first.