It might save lives. It might lead to mistreatment of many innocent people. How do you know which beforehand? If you can't know, are you happy with the abandonment of innocent until proven guilty?
Last, I've noticed an increasingly positive portrayal of torture in TV of late, say the last ten years. It's neater. The good guys seem to do it as a matter of course. It's more likely to be effective. Is this coincidental? Am I just watching the wrong shows?