The point remains that when we are talking about traditional copper cup/lead core bullets, velocity much over 2500 can result in the bullet failing. If the bullet fails and the animal dies, there is little to complain about, and such failures can result in spectacular wounds as you describe. Bullet failures can also result in nasty flesh wounds without sufficient penetration to kill the animal, as we would prefer.
The last animal that I shot with a high velocity bullet (a seal) hit broad side on the shoulder, but the bullet went to pieces without penetrating into the chest. Another animal, in this case a stray dog, I shot with a high velocity small bore again created a huge but shallow wound, and the animal was in much distress until I was able to finish it.
I think I've shown that when a bullet is loaded to a velocity that is within it's design parameters, that’s a better way to go. Choosing the heaviest bullet that provides a trajectory suitable for our purposes gives us the best chance of success regardless of bore size.