If you think every single wire shows up on a map somewhere accessible to the everyday pilot.....you are in serious need of a drug test. That statement ranks up there with something like The Sultan might say.
tiny telephone wires (which will snap before they take out a helicopter
Wrap them puppies around your P/C Links......and see what happens.
As to flying near Trees....despite there being some trees in the UK....we have wood lots bigger than some of your forests.....out west where logging still goes on.....Wires can crop up within hours.....so the valley you just flew up might not be as safe as you think on the way back home.
Single or Twin....engine failures are so far down the risk scale compared to wire strikes...particularly in degree of outcome.....they just don't matter and you know it.
As the conventional wisdom proves.....Wires can be anywhere Crab....and that means even right up there at the far end of your LZ.....that is the point Mate....one never knows.
You just keep doing your normal approaches using the school solution and allow the rest of us to do what we see as best meeting our needs.