I agree with you to a point. If a person is not going to respect the game animal enough to limit its suffering then they should not be out there chasing them. And the sad thing is there are many out there who do just that.
I do not know Skychief personally, but I have read his posts and if he puts as much effort into this quest as he did to figure out the Skychief special (he could have just said "a square load was good enough back then, Its good enough for me"), I believe that he will practice and know the limitations of his abilities and equipment and stay well within this limitations. The regulations regulating caliber and barrel length will ensure sufficient energy to humanely harvest a deer. The rest will lay in his abilities to shoot said pistol with accuracy. If when the time comes, He feels his abilities are not sufficient he will reach for a rifle or smoothbore.
My heartburn comes when people say well its legal, lets see what it does, and not worry about if it leaves a wounded a critter or not. That is not the case here.
There are people that say a longbow or recurve are not adiquate for hunting either compared to a crossbow or compound. If they are of proper weight, just like the proper pistol, In the hands of someone who knows how to use them, they are highly effective at taking any size game.
Heck, there are folks out there who say that flintlocks are not accurate or fast enough for hunting either!! Its all Relative.
My 2 cents, worth what you paid for them!