Don’t know why they don’t put the electrical wiring underground?
Expensive. Also, water.
Burying transmission lines costs a lot more than the cost of repairing these towers once ever thirty years. Plus it is much harder to maintain the lines if they are underground.
This is why it makes much more sense to build the power generating station right on the edge of the big cities. Where the majority of power is needed. Instead of generating the power at a wind turbine hundreds of miles away. There is a power loss in that transmission. It costs money to build and maintain those transmission lines. The longer they are, the more expensive they are to build. Including just the gauge/diameter of the actual wire.