Why is it neccessarily because of political correctness though? Imo it would also be a problem of realism, or allocating resources. As in making your other companions realistically react to the fact they're now traveling with a walking grotesque that used to be a comrade in arms. And how far could you really go with that until someone goes "f*** it, I'm not waiting around for that to happen to me" and just plain decides to ambush you in the night, tie or lock you up, and then only bring out your cage when they need that glowy hand?
A problem of realism? Thedas is based off the medevial era when they were practically inventing new ways of torturing people every day, like the Iron Maiden. Torture racks also exist in DA, Howe and the Crows used them in DAO.
And yes, it might be due to lack of resources. But I doubt that, the devs have flat out stated that there will be no torture in the game, period.
As for making companions react, it's not like you haven't done morally grey/evil things before in previous games. I'd say some might leave you or even try to kill you like Leliana and Wynne did when you defile the Sacred Ashes, and you would just get a hit in approval from others. Varric will definitely not like it. The rest of the Inquisition might be more apprehensive and wary of you. Would they lock you up? I don't think so, you're the only person who can close the tears and they will not want to make an enemy out of you.
After all, you can sell Fenris back to Danarius (which is basically the same as torturing him, you just condemned him to a life of sexual abuse and servitude) and all you got in return was about 15 rivalry points from everyone but Anders.