In my view it does not.
Because your view is that law shouldn't tell us what is right or wrong because we as humans commit crimes no matter the law?
We shouldn't be against smaller evil as long as big evil remains?
Not quite so.
We humans lived millions of years by certain rules. Rules ensured that groups could function which in turn increased chances of survival. Inside the group, some limits were imposed, hierarchy, dos and don'ts, etc . No different than wolf pack. That's how nature made us (or God, if you're religious)
The more successful the bigger that group, tribe, clan, nation became and with that more complex. So did the rules of behavior, you can call them code of conduct, morals, ethics, pick your term. Even with increased complexity, there was always very clear what's right and what's wrong.
The bible, the laws, modern ethics, all are pretty much based on it. Sometimes, code of conduct took wrong turn so far and so badly, that even some big and powerful civilizations fell as a result of moral decay, at other times, deviation was corrected by wars and revolutions, education, religion.
With ever increasing world population, industrialization, technological advances, societies evolved and moral rules became increasingly complex and codified into the laws just about everywhere on this planet, yet the basic rules are still the same.
Today, philosophers discuss the ethics, change the rules, drop some and create new ones, so do politicians and people, some ignore them like tyrants and criminals, and some do not understand them for various reasons, some wish them simplified, some even more complex.
And even though we live in the same society, by the same laws, we also create our own which are part of individual moral fortitude. The one we live by.
Luckily, enough people set pretty high personal standards, draw the lines which they don't cross, no matter the hardship, which ensures survival of us as a civilized society during dark times, like war, natural disasters, terrorist attacks and so on.
On the end, it really is simple, there is the difference between right and wrong, even if some can't see the line which separates them, and the torture is definitely on the wrong side.
Besides of all of the above, how can anyone consider being free, living in a country where people are tortured?