I am not second guessing the levels of pain, I myself have had a dislocated elbow, my wifes sister has had her elbow dislocated about 5 times in her life, never seen her taken to a hospital on morphine and on a stretcher, that would be an absolute waste of NHS resources, don't you think?
I myself have had it like I said as well, it was painful as fuck, not denying that but I drove myself to the hospital when it happened, I didn't have a team of paramedics babysitting me.
But it would make sense to use a stretcher for those injuries you describe because they impair your ability to walk, at the very least you would need someone to help you, just like Kane did, Pain tolerance isn't an individual thing, people don't have higher/lower levels of it, it's a mentality thing, it's not about what "hurts more" of course certain things will hurt more than others, it's about HOW YOU DEAL WITH THE PAIN, that's my point.