Here's what I think....the spiritual side of bowmaking should be left to the maker, but others might, and some do, rely on the testing of the bows to find whether or not the bow shoots the way it is supposed to. But as said by Squirrel, if the bow shoots well enough for you, and you like the feel of it, the extra set or whatever it is should not be given another thought. All of the bows I used to make had at least 3" of set, if not more. And they shot good enough for me at the time, but they were slower than those I make now, because the set has been reduced a lot.
Sean