> In the case of torturing someone, you are inflicting only pain (which is not as bad as death) on someone who is probably guilty of a crime (which is not as bad as inflicting pain on someone who is completely innocent).
I'm afraid it's more complicated than that. I get that you're trying to draw a contrast and use "their version of things", but "their version" is completely flawed to the point of misinformation.
Torture can be so bad that it destroys a person psychologically. For some people who were tortured, they might as well be dead.
Likewise - people who are being tortured aren't "probably" guilty of a crime. Actually, they probably aren't. They just happen to know a small bit about somebody who is guilty of a crime[0]. Put differently: You don't torture the hardened criminals, because they are likely prepared for it. You torture people who are (mostly) civilians because they are weak and if they know something, they'll talk. For a civilian, torture means ripping them away from their life, making them long to go back. For a criminal, torture is a likely outcome of what they do anyways.
Torture is just another way in which the gift of collateral damage is brought to innocent people. War, in all of its facets, is waged against civilians.
Finally - torture is only unreliable in certain areas. It is completely unreliable in the contrast you draw - applied on hardened criminals who are high value targets in an armed conflict. But it succeeds beautifully in the two areas that it was designed for: terrorizing civilians and giving military psychos a plaything to destroy.
[0]This is actually the most important argument against "I have nothing to hide".