We already caused earthquakes because of fracking and conventional geothermal plants and there is only little energy captured. Allmost everything that is scaled

We already caused earthquakes because of fracking and conventional geothermal plants and there is only little energy captured. Allmost everything that is scaled up massivly in reality, comes with its own problems. Burning some coal? Not a problem. But allmost every human burning coal on a massive scale? That is bad. Same principle could apply with taking energy from the crust. There are forces at play, we simply do not understand yet. "The team will also measure the temperature gradient as the solid rock transitions into magma. One of the big surprises of the earlier, unexpected encounter between drill and magma chamber at the site was how rapidly that occurs. “The theory was that you would go through solid rock and into what is called the brittle-ductile boundary, where the rock would be starting to get a little bit softer and more elastic because of the heat,” says Ingólfsson. That was expected to occur over hundreds of metres, but, with Krafla, it was just a few."