>>2725"Self-insert" is so muddled. I've seen it used to mean a certain character archetype itself, the act of literally imagining oneself in the story for wish fulfillment, relating to characters in any way…
Anyway, I'm sure you don't mean to say "don't identify with characters within whom you see an element of yourself", which is actually autistic and contrary to 'how' 'humans' 'respond' 'to' 'fiction' dating all the way back to at least Aristotle.
Certainly you must mean "don't have a psychotic break when you identify less with a character over the course of a story", which is… trivial.