That's exactly what I'm saying. You apparently think burying hundreds of miles of cable won't impact nature at all. On the contrary, it has a big impact while you're laying it, and when you're done, you still have a cleared area above and around the buried cables that you have to maintain. It's less vulnerable to weather damage than above ground, and cables don't break and fall off towers, presenting a fire hazard, and it looks prettier than a series of towers and cables running across the landscape, but it still has a big impact.