My first answer was that the man seemed to have made the choice that satisfied his logic.
Not for me! I have top performing optics around my neck almost 100% of my hunting time, even when sitting over a bear bait. There's are a plethora of tiny movements happening in the woods, whether you are looking 15 or 1500 yards! This May I sat over a bear bait for a week, passing up everything that came in. But, the big one that was visible THIS YEAR because of last summer's forest fire came to 80-150 yards almost every night and gave me lots to look at through my binocs! That sucker kept all the little bait bandits away, but watching him grunt, huff, and bluff charge through my glasses was a real treat! Yes, he got to gorge himself later, after dark! But, I also got some great views of many Western Tanagers(one of Mother Nature' most beautiful birds)and some Stellar Jays while they were on the bait just a few yards away. I watched every one of them through the binocs, just like the birders do. If you study the birding websites, you will learn they look for enough clarity to define the structure of a feather at 15 yards or less. But, some bow hunters seem to feel they don't need optics until they can barely see the outline of a several hundred pound animal at whatever distance? Sorry, I'll leave the camera and a lot of other things I normally carry at home before I will leave out the binocs!