Low power allows you to pick up your target faster. Better for close range. Also allows you to shoot with both eyes open. Faster target acquisition. Red dot type "scopes" are great if you don't need magnification.
I used to think scopes were overrated, but then my brother in law and I got into a group of mulies as the light was failing -- he had a scope on his rifle and I didn't. He got his deer, but I couldn't see the front blade reliably enough to take the shot. I've been a scope hunter ever since.
Of course, after a few years of that mentality I hunted whitetails in the woods of Alabama. My son and I jumped three whitetail that exploded out of the brush to our right and bounded off to our left just a few yards away. I snapped my rifle up, but all I saw was tree branches.
There's no solution that works every time. Sometimes you need both.
Let me start by telling you the story of two Johns.
John number one went on a day hike with a couple of friends in the Cascade Mountains about an hour from Seattle. He somehow got separated from his buddies and became lost. John was dressed in casual cloths for a warm weather day hike and had nothing but a lunch with him. He spent three days in those mountains and luckily made it out to tell the story.
John number two, a friend of John number one, was much better prepared when...