> Energy comes from gradients
Way late, sorry, only just saw this. But, mmmm that's not true.
You can have lots of energy, but no differences in a system. If there's no differences you can't actually use any of that. Usable work comes from the gradients/differences in energy. Energy isn't a measure of usable work. It's a measure of capacity and confusingly, just because you have lots of capacity doesn't mean it's usable.
Maxwell's demon is a great example. There's lots of energy in the initial state because of particles bouncing around, but you can't extract anything from that until the demon separates the fast and slow moving particles.
Another example is the Quantum Vacuum field and it's zero-point energy[0]. It has a non-zero energy amount literally everywhere in it's ground state, but it's not usable. You can't make a device that extracts that energy, without paying for it someway else[1].
FYI, I know nothing - I just watch a lot of PBS Spacetime.
[0] https://en.wikipedia.org/wiki/Quantum_vacuum_state#Non-zero_...
[1] https://www.youtube.com/watch?v=8CgquHFM_O8