Yes, I thought that was obvious from the start. What part of “Luke shouldn’t have hesitated” did you find unclear?

Let me give you an analogy. You see a huge guy, beside himself with rage, winding up to chop a baby using a machete. Do you think it’s psychopathic to shoot him in the face to save the baby? That’s the position Luke was in. He could see what Ben was going to do in the future just as clearly as you can see what the big angry guy is about to do. And if you hesitated and the baby ended up chopped in half, you’d probably feel a lot of regret and guilt, just like Luke.

The Jedi exist in a universe where the deity they worship is actually real and provides them with both a way of seeing far into the future as well as an objectively correct moral compass. This means the Jedi are ethically obligated to act in ways that might seems psychopathic to people who do not posses such clairvoyance. This is precisely why they’re supposed to avoid emotional attachments, because those might compel them to act in ways that feel better in the moment but end up doing far more harm. The older I get, the more convinced I become that basically all of humanity’s problems boil down to people doing what they feel like instead of what they know they should.