Based on ones physical build and what kind of comfortable position he or she has to get into ,,,,that is , sitting at a tree on the ground ,,,I can see how a scope would be beneficial .The scope allows the hunter/shooter to keep his/her head up in a more comfortable position when sitting on the ground . It's very difficult for me to sit on the ground , with the gun on my knee, or on my hand which is on my knee , and maintain a perfect sight picture with only a bead or open sights . The head will automatically want to return to a more relaxed position , which is upright and away from the gun stock , which in turn during the highest level of excitement leaves many of us shooting a hole in the sky instead of wattles .
But , I don't have a scope on my double . I choose to go unaided , even if it means taking a running shot . And the older I get the less I sit on the ground ,,,,,I stand many times and just lean against a tree . I can stand still longer than I can sit .
Like you stated , to each his own . what works for me just may not fit most hunters .And even though I've been using scopes all my life I prefer not to have to take a running shot on a turkeys head with a scoped shotgun .
Seems like everything has a give and take , advantage and disadvantage about it .