Auto-Towing - why is this not more popular?

Out in the prairies, trees and power lines
are less prevalent than center pivot
irrigators and barbed wire fences. The
neighboring farmers might let us put in
gates to run the winch line another 3000'
+, but I'm wondering if we could mount
high pulleys at the fence lines to avoid
rubbing against fence posts etc.

If we could get a drone with PowerFLARM
to pull the line back, life would be really
good except for the pipeline patrol guy.