I saw a guy on TV once who had this medium sized box, like a breadbox, with a spigot on it.
He put a rock in the box, a beaker under the spigot, and turned it on - a few minutes later, the beaker was half filled with fairly clean oil.
It was a modded microwave - it literally boils the oil out of the rocks without actually heating the shale.
Yes, it is amazing.
However, one must consider the energy required to produce enough heat to ‘boil the oil out of rock’.