If the only way you approach the argument that Luke has been characterized improperly is by saying that the audience is merely blinded by their emotion, insofar as to say they should be ashamed of being impassioned by their connection to the films, the conversation doesn’t last much longer afterwards. The reason they cut the flashback after seeing the temple burn is because it would look absolutely ridiculous to visualize Luke packing up and leaving for good without a plan of action or a means to correct the mistake he felt so badly about.