You also have to take into consideration the different types of pain - someone may be able to endure throbbing pain for hours, but some sharp sudden pain would do them in and they’d break just like that. Likewise pain in one area of the body doesn’t equate to another. Some people are more sensitive in different places and in different ways. Lastly, some people are emotionally attached to their bodies in different ways - one person may be fine with pain, but cave when their ability to reproduce is threatened, another may tolerate bones being broken for hours but then break when their jaw or nose is broken, because they’re attached more to their facial appearance than their body.
More importantly, there’s the psychological/mental difference between torture and pain.
If I’m in pain from something in normal life, I know what I can do to fix it - take medicine, go to the doctor, whatever. As a viable adult person usually in populated areas, I am in control of my life to a large extent, so pain/damage isn’t so bad, because I can always think “when it gets bad enough, I’ll do x, or if I’m trapped or pinned, eventually *someone *will come by and then x will happen.”
If I’m being held by someone, and that someone is purposefully inflicting pain, there’s also panic/distress from being captive, and then the added loss of control over your physical situation.
So it isn’t just pain tolerance, or even experience with regular non-purposefully-inflicted-pain. There’s the psychological angle also. Some people with very high pain tolerance don’t have an equally good tolerance of being out of control of their situation.
I fall into that category - for me, he wouldn’t even have to do more than threaten me with potential harm. I feel enough distress and “pain” from having been caught in the first place, and now being held captive and unable to escape thus far that I would capitulate instantly while I still had my mind in good enough working order that I could at least try and control what information I passed on.
It isn’t an issue of avoiding pain (not that I don’t want to avoid pain - I do, a lot.) so much as an issue of retaining what little control I have of the situation (which to me is psychologically more important).