I think that's one of the aspects most underappreciated by fandom. People want their characters to be more-or-less perfect heroes who are right all the time. When a hero says something, or does something, they want to be able to take it as given that it's right, and too often they do take it as given that it's right -- and when the hero fails them by not being right, it's some kind of betrayal of their heroism -- as if Jacen's not having all the answers is an affront to heroism, and teenage dreamer Jacen should BE RIGHT and HAVE ALL THE ANSWERS because if he doesn't he SUCKS AT HEROING and is AWFUL. Or he's disagreeing with Luke, who is a bigger hero, and therefore always right, so he's WRONG for disagreeing with Luke and he's AWFUL and should GET IN LINE because protagonists aren't allowed to disagree or question an authority figure we like and how dare those authors have him arguing with Luke. Or because heroes must be right all the time, and a hero is saying these things, the story is trying to tell us that he's right, but these fans don't think he's right, so the story is AWFUL for SHOVING these WRONG IDEAS from this hero DOWN OUR THROATS with their terrible message that teenage idealist Jacen is obviously supposed to be spouting as the TRUTH as the voice of the author. And it all stems from this inability to grasp character fallibility and to appreciate that maybe you won't like the result of it or everything he has to say, but maybe a thoughtful teenage idealist should be shown struggling with ideas and saying some slightly unrealistic things as he tries to get a handle on the world as an emerging adult, and maybe teenage idealists can be really interesting characters even if they aren't Voices of Truth.