Just a couple pics of mule deer in their natural surroundings in this part of the country.
The deer are practically invisible to the naked eye. Aperture sights would not be easy to see the target. Terrain/vegetation does not lend itself to 'square range' shooting positions.
My spotting location,
Deer at 400 yards,
Nice buck, bedded at 600 yards.
With the aid of rangefinder, bipod, beanbag, optic with turrets (and plenty of practice building a field shooting position), all are doable.
If your hunting requires it?
Nothin' wrong with good support and fancy accoutrements.
In fact, there's nothing particularly wrong w/ them at all.
But if one needs them at <300 yards?
...then Marksmanship skills are lacking.
That's all.
Look at shooting aids like using a fish-finder for bass.