My intuition is that there are a number of big problems: 1) power that a power station could supply is limited to the thermal conduction within the earth's crust that the power plant has access to. Instantaneous power can be high, but it would cool down the rocks. I don't think rocks are good conductors. It seems one needs to somehow access a large surface area (facing down) of rocks but a drill hole is vertical.
2) getting heated steam from inside the crust to the surface for electricity conversion faces losses by way of heat conduction to the drill hole. What are the losses there per km, for instance? Does this make some depth infeasible?
Separately, has anyone done a calculation of the actual energy that is released from the inside of the earth through the surface? It seem extremely small for most parts of the world and so would need a massive surface area. I am sceptical that there are many areas which would provide consistent long term energy (over just cooling the rocks too far).