Falci: He reacted by instinctively lighting up his lightsaber.
Which is exactly what the audience seems to have seen as well. XD Less lazy writing, more lazy watching.
LootHunter: No. That's exactly what I saw and exactly what I find unthinkable for Luke. Pulling a lightsaber on a defenseless sleeping kid, acting just on instinct? Seriously?! The whole point of Jedi is NOT to act on instincts and emotions.
By the way, the same applies to Teela and Randor - they were acting on pure emotions, which doesn't make sense for people who due to their own position have to be able to think rationally under stress.
P.S. I apologize for barging in again. I really wanted to end the conversation but then you accused me of "lazy watching" and I wanted to clear that.
About the joke, I'm sorry. As I was writing, it seemed funny, because I included myself in the lazy watchers, but after posting it, I kept having that feeling that it would rub someone the wrong way and I should edit and remove. When I came back, you had already made your comment, so the edit would be pointless.
About Luke, he also mentions that the Jedi were defeated and nearly wiped out at the height of their power and pride. The point of the movie's story is failure. Failing and learning from it and growing. By the end of the movie, everybody has failed a lot, but only the heroes were able to learn and grow and do better.
From you comments on all three characters, you seem to want them to be infallible, or, at least, only able to commit "agreeable mistakes". The thing is, that makes writing good drama terribly difficult. There's a reason "Mary Sue" is not a particularly appreciated trope: more often than not, it's boring as fuck.
It doesn't even make sense to expect Randor and Teela to be stellar examples of people in positions of power acting rationally: in the real world, we see people in positions of power being irrationally emotional all the time. In fact, it's so often incredibly trashy, pathetic, evil, corrupt behavior, that the two fictional characters ares still leagues above real world powerful public figures in terms of class and justifiability of their acts.
Superman, for example, is usually considered a hard as hell character to write properly because not only he is incredibly overpowered and he's literally the best and most humane person around. More often than not, DC comics reboots him, nerfs him and tries to portray him younger, still learning, because it makes for easier and better drama. It, usually, takes a great writer to do him justice.