I am going to agree with the OP. Most PHs I know won't let hunters shoot beyond 400 yards and most people shouldn't shoot beyond 200.
At one time as a competitive shooter I shot 500 arrows a week with my bow and could put 5 arrows in a softball at over a hundred yards. We shot 200, 400, and 3x600s in the off season. Most range sessions consisted of a full day of shooting around 300-400 rounds between 3 or 4 rifles out to 1250 yards. I have hit cold bore shots with a 6.5x284 past a 1000 yards and shot groups at 2,4,&600 yards that measured .25 moa… Wait for it!!! And miss a 140-150 class 250 lbs ten point at 150 yards!
Buck fever gets the best of us!
I don't think I have ever missed with my bow, but my furthest shot ever was 42 yards. People get nervous. Over confident! And sometimes stupid with a gun. They shoot more gun then they need or can handle because they want to go long. But, as has already been stated, they don't practice enough and then their heart rate gets up and bam!!! They can't hit the broad side of a barn.
I remember a friend of mine who was a shooting instructor talking about a guy who had killed 8 recorded book animals. He came to him for help. The last one he killed he shot in the butt, an elk. Told my friend I was aiming behind his shoulder!
Said he got so nervous he nearly wet himself. He hit the artery is the only reason they recovered the animal.
Even the best of us can flub a shot under the right circumstances. I have been hunting for over forty years in seven states and on three continents and I have never had to take a shot on a big game animal beyond 400. Got a buddy who has killed several book animals, elk, whitetail and mule deer and his furthest kill is just over 450 on a mule deer.
We see incredible shots done on this forum all the time. People make great shots on incredible animals at ranges well beyond 500 yards. With today's equipment a shot at a 1000 yards is completely within reach but not for the "average" hunter or weekend warrior who shoots a gun maybe twice a year. I personally start over thinking things around the 450 yard mark and I can ring still all day at 1000+ and not miss an 12" target. There is so much more to it than hitting steal from the prone or bench when an animal is involved. I would say most people need to keep it inside 200.
That said, we are head out to Texas and New Mexico this fall on a sheep hunt and if the shot comes at 6-700 yards we are probably going to take it.
Ginger Moorhead once said, "At the practice butts everybody is equal. It is the one with the best mental game that wins!"