Good point, cranky. Probably a bit of both. Qualitatively speaking, we started stringing up power lines over our heads even before we were free climbing the Empire State Building's frame and riding the hook on the cranes, and I'm guessing the track record for performance of that cabling is much better than for rigged loads.
There's also a risk/reward aspect: in a factory, a worker loses 45 seconds every hour because they have to go around column A to the left instead of the to the right. That math works out for me if there's a risk of being crushed by something because somebody was a little too tired that morning and didn't thoroughly complete their pre-shift rigging inspection. But if you have a cable that doesn't move (except for wind, birds landing on it, etc.) that's fixed in place using methods proven to work over a century of experience with a vanishingly small failure rate, I'll walk under the power line if the alternative is to cut off power to a million people just so I can walk my dog.
With that said, there is a push where I am to move electrical infrastructure underground. Granted, this is more for reliability in a hurricane prone environment than everyday safety, but the latter is a positive if unintended consequence.