How can people compare their pain to that of a woman in labor?

I’ve heard, for example, that passing gall stones hurts “worse” than labor. Now, the only way we could know that is true is if a woman had gone through labor, from beginning to end, including through the final transition stage (which is where the serious pain lies in wait to grab you by the throat and smash you to the floor!) with no drugs at all, and then that same woman, at some point in her life, passed a gall stone.

How can people compare their pain to something that half of them will NEVER experience, and, of the remaining half, most of them won’t give birth without some sort of pain medication?