The accuracy of the gun is not in question - the ability of an individual to shoot the gun accurately under stress is.
I don't think we're disagreeing here. I'm not making it an accuracy issue, just pointing out that the gun (short 870 and high power revolvers) is up to the task for many situations when used within their limitations (just like any other gun)..much more than the shooter most likely is. The tool is only as good as the operator, and that gets lost a lot of the time. That is where proper training comes in, training beyond a basic level which simulated real life situations AFTER the basics are mastered
I would have less issue if the gun was equipped with a full shoulder stock. I agree, the full stock is better than the pg, the pg is a niche product that excels in a particular situation and does a great job. However with practice a skilled person can shoot the shorter guns very effectively. I can pass our Dept's Bear Defence qualification with the 8.5" 870 with distances up to 25m whereas others can hardly pass it with the full 20" gun, it's all about proficiency and ability.
Practice all you like with the big bore handguns, but if you can't bring a gun down out of recoil for a repeat shot - all that power all that power does you little good if your first shot isn't right. This is not a markmanship issue rather a s**t happens issue. That should go without saying, if one can't effectively use any tool they should not be using it. The short 870 and high power revolvers are diffuclt to shoot effectively and beyond the capability of many shooters. However many people can and do shoot them effectively enough to use in a life & death defence situation. It is partially a training (Basic and advanced Practical) issue as well as personal physical limits. I think many people have no idea about this when it comes to shooting ability, gun capability and stress situations- I see it a lot when I deliver this type of training. The gun is the tool and the result (within reason) falls on the actions, physical condition, training and mental state of the operator. Some will be able to handle and shoot a 454 Casull effectively whereas some can hardly handle a 357 Magnum, some will people react differently wrt mental and emotional responses, there are people carrying full shotguns that can't hit S**T when under stress.
I am off to do the same with polar bears - of course they are encountered here on nearly a daily basis now - I don't have to go looking for them.