I hunt the open country and have never hunted with a rifle out of a blind. Usually I sit on a fence line above a canyon for a few hours in the morning, when the deer are moving around. Once things slow down I hike mid canyon and start pushing through each canyon. All deer either hold until they cannot hold anymore (easy shot), or they kick out and almost always stop and turn broadside to see if you are continuing pursuit.
I always thought blinds should be used in a alfalfa field in the evening hours, to ambush deer when they come out to feed. Or use them during archery season to help present a shot at closer range. I suppose if you are hunting 100% wide open country with no ditches, draws, canyons, sage brush, etc.; then perhaps a blind may be helpful. I would rather push canyons and depend on my skill with a rifle to kill a deer at longer range. 2 cents