It’s absurd to trim trees like this.
There are high power lines.
There’s a helicopter.
There are cables.
Do the math.
It turns out, apparently, that a swinging chainsaw is far safer than having men and women climbing through trees with ropes and saws. We don’t notice someone falling out of a tree and breaking an arm (or worse) because it doesn’t make good TV. And if you assign 100 people to go out into the dense forest and expose themselves to this risk, it doesn’t feel nearly as fraught as the crazy helicopter option, even if it turns out to be safer.
Often, that’s our instinct. To pay the persistent, consistent, significant price of deniable small dangers and avoid even the feeling of the big loss, even if it’s actually less dangerous.