I think you have a fundamental misunderstanding of how live wire accidents happen and are prevented.

Live wire accidents happen because people operating equipment capable of hitting the wires are looking elsewhere because looking elsewhere is a fundamental part of doing their job. The crane operator looking at the load or the helicopter pilot watching something on the ground is who hits a live wires. Not hitting live wires is caused by knowing where they are ahead of time and planning your work so you don't hit them. Making the wire invisible doesn't really change that. It's not like this tech would be used for residential lines where every Joe schmoe is operating a man-lift.