What I'm saying is that biomass has been sinking down into the Earth for as long as biomass has been growing and it may well be that the living crust has evolved as a mechanism for transporting solar energy to the core, which keeps it hot. We don't want to reach a point in the distant future (and I assume human life to be permaculture barring wholesale holocaust of everyone) where the energy circuit between sunlight and core heat is breached and all the sunlight is just heating the surface while all the water has sunken into the core because it has mostly solidified and hydraulic fracturing has hollowed out pathways deeper and deeper where water can flow into cavities far beneath the surface.

Mars lacks a molten core and thus magnetic field to protect against harmful radiation. It probably has lots of hollow cavities throughout the solid core where water has seeped down. Can you imagine how much energy would be required to pump water from such cavities to the surface? Why would we want to do that on Earth if we can maintain the current system where the molten core basically self-seals any cracks that form in it, which keeps water on the surface? Is it really worth digging up every possible source of core heat, including fossil fuels and radioactive materials when we have plenty of sunlight and solar heat convection currents (wind) available on the surface?

Humans are smart but egoistic. The moment we understand something, we want to harness it for superficial purposes before understanding how it fits into the bigger picture of nature as a vast interconnected system. We figure out gravity compresses old biomass into fossil fuels and we figure out we can extract and burn these fuels to make our own labor easier and perform some neat tricks with previously unimagined concentrations of energy-expenditure. Then the ego takes over and everyone starts competing to put on the most impressive energy show. It's not sustainable. It's not worth destroying the planet. It's a cop out to say it will take 1000s of years for the destruction to be complete. Slow death by a thousand cuts is no better than a quick demise, and arguable worse.