By that logic, fossil fuel is a storage medium too. Solar energy was used as the energy source to make fossil fuel.
That we are wasting energy which has been stored and untapped for hundreds of thousands of years? Do we really expect that our ancestors will be better able to exploit this value than we are... without our given expliotation? Will this be true forever? Should we just let that stored energy remain forever?
Ceteris parabis, we will extract exactly as much value from our ancestors as makes sense. And our ancestors will do exactly the same. I do not begrudge them that any mire than I begrudge us this current state of affairs.