The torture report, well, the redacted summary of the 6,000 page full report anyway, makes clear that the second, subsidiary, justification for torture made during the G.W. Bush Administration is complete poppycock. The first justification concerns morality and is premised on the “ticking time bomb” scenario where a single person can suffer torture now or a lot of people can suffer an exploded bomb within a short time period.
The second justification is one of effectiveness, that torture can quickly and effectively elicit truthful answers in time to prevent terrible things from happening. It's the second justification that's squashed utterly by the report. Even people in the CIA, at the time, could see that the US wasn't obtaining any worthwhile information that couldn't have been obtained just as quickly by using a gentler approach. The Intelligence Committee reviewed 20 claims of torture having prevented a “ticking time bomb” scenario and found them all to be without foundation.
The report demonstrates that the CIA's torture program was out of control and that the CIA frequently lied to superiors and failed to even conduct any sort of internal assessment of whether torture was effective or not. Claims that the program was effective rested on lies and wishful thinking, not on any sort of factual basis.
What does it all mean? A society that tries to become a better society has no use for torture. Torture has a corrupting effect on its practitioners as the report documents. Torture has no benefits to balance or to justify its evil effects, not even if we agree that war in general is justified.