I think there's a myth about shooting freehand, though my next gun will be very light so I can do more. The myth, I think is that it was always the preferred method of shooting. Back in the old muzzle loader days, the military lined up and shot off hand, but, they did volley shots, so the entire line acted more like a big shot gun. Accuracy, and I mean pin point accuracy has always required some support. Even as far back as the French Musketeers, shooting supports were used and of course, for muskets, required.
I did a lot of free hand when younger and .22 long rifle was $5 per brick. Cheap ammunition made for learning a lot of bad habits I'm still unlearning. Even then, for really long or accurate shots, I tended to lean across the hood of the car (Bonnet for our British friends), and stabilize the shots. I was never that good, though I could hit a ground squirrel on the run at 50 yards (sometimes!).
Europeans do off hand shooting on the driven hunts, but when shooting a pig on the run the target zone is bigger than the bench rest targets we extol at Extreme Bench. I think I'm trying to say, there's different accuracy levels depending on the type of shooting. Pigs require one type of accuracy with maybe a 4 to 6 inch kill zone, where extreme benchrest is more like 5.5 mm.
Even hunting doves and pigeons gives a fairly large kill spot compared to bench rest shooting. So, I guess accuracy is all in the purpose. Right now, I'm working on bench and not hunting, so off hand isn't really in my playbook, where if I change to hunting, I'll still look for a support, but take the off hand shots when offered.