The power lines being followed are not the ones that will kill you. It's the lines crossing up ahead, that you are blissfully unaware of.
agreed but you miss my point - in poor weather over forested or featureless terrain where you know there is a set of wires, once found then keeping them visual is a far better option than going 'off-piste' and then encountering them again where they might not be so obvious.
As JE says, it's the ones you can't see that will get you.
Fortunately in UK, most wires are well marked on maps - if you are using the correct scale for your type of flight - but I know of crews in NI who arrived in fields to collect troops in a punchy quickstop to running landing style who looked up at the end to find themselves under a set of domestic wires.