I think there are some people, no idea how many, that adopt the lead in the air philosophy. In my opinion, you should be surprised when you miss a shot on game. If you are not surprised you missed then you shouldn't have taken the shot.Also, I don't know if it also has to do with an ethic of pulling the trigger and expecting to kill. Sometimes, it seems like there is the feeling among some that if I hit the animal anywhere with my 300WM, it will die. And it doesn't always happen that way.
As far as hitting anywhere, people are extremely ignorant. My kids have a smokeless muzzleloader with a massive brake to hunt whitetails with (we wear electronic muffs to hunt with it). It shoots what is the equivalent of a varmint series 300 grain nosler ballistic tip (if such a thing existed). My kids have shot a ton. More than the average hunter shoots in a lifetime, but they learned from the beginning to build good positions, etc. Sometimes they get in awkward positions on close hunting shots and don't think it will matter because the shot is "close." Even with that massive, highly frangible bullet going 2750 fps, there has only been one bad shot that missed the vitals by couple inches and the shrapnel from the bullet got to the heart/lungs and killed the deer. There have been a few other instances where we have had to find the deer and put a good bullet in it. This is with a gun that hits like a freight train compared to a 300WM. I feel fortunate to have the whitetail hunting opportunity we have to kill multiple deer a year, and I know that creates a lot of experience to draw from. People's ignorance about bullet performance is pretty surprising to me, but I have heard a few people say the same things about it.