Your line of argument is similar to this:
Your grandfather stalked closer because he wasn't a good enough shot to make the long shot.
So...instead of knocking someone when they ask for opinions (especially when they probably have killed more game than you have seen), offer them your opinion on the question. BigRedd didn't ask who killed what at what distance with a 30-30 or a 30-06.
Happy you got your kick in?
I've seen a lot, and taken a lot of game and learned from one of the best. I refer to myself as a 'young buck' in comparison to my Grandfather's age. He was 79 when he passed earlier this year in March...and he took his final deer last November at a range of 394 yards...with a .270wsm. He happened to be a military marksman in his younger days...but he also loved stalking his quarry due to the challenge and adrenaline rush involved.
So, if there's calibre recommendation needed for the long-range gang...then I guess the best hunter I ever knew gave the recommendation with the .270wsm. Plinking deer from afar just isn't my cup of tea...especially when I have two good legs still. Grandpa didn't.
Good hunting.