Leia does distract him. She’s not the one who redeems him, it’s Rey. Kylo starts second guessing his dark path after Rey “kills” him and then revives him. The “hallucination” of Han is a personification of Ben’s internal struggle. He’s reliving a memory of his darkest moment and realizing it could’ve gone differently.
I see what you’re saying, but I don’t think that’s enough. Kylo isn’t good again all the sudden just because someone he just tried to kill just seconds earlier decides to save him. Leia’s sacrifice proves the great lengths she and Han were willing to go to in order to bring their son back to the light. Rey can’t redeem Kylo, he needs to decide that for himself, and I think Leia and the Han convo actually is more effective in helping to move that along better. Rey just seals the deal by only wanting to take Ben’s hand, not Kylo’s. Again, just my opinion, no disrespect meant. Anyway, I’ve made a few tweaks since the earlier clip, so a new one is coming up shortly.