AFAIK they aren't planning to do any fracking, and it's not obvious that it is even possible at these depths. And the drilling is far less disruptive as it is g

AFAIK they aren't planning to do any fracking, and it's not obvious that it is even possible at these depths. And the drilling is far less disruptive as it is given that it is done at atmospheric pressure (no drilling fluid). As for your second point, batteries are not cheap. Nowhere near cheap. We need solutions not pipe dreams.