No, that cannot be all of it. If you decide whether or not to marry someone, the how is not simply relegated to the area of effectiveness. To say that since we have decided to kill animals, the only criterion is effectiveness (whatever effectiveness means), and so are engaged in moral evil and can therefore turn a blind eye to what that entails is what a lot of people do, but it is shaky. Whatever my views on capital punishment, drawing and quartering the victim is even more repugnant. (On the other hand, if you are against capital punishment you might argue that the more gruesome the better, as long as it is carried out in full public view). Pollan argues for transparent slaughter houses.

yours, Peter T.