As dumb as some people claim it to be... I just see this as the aftermath of some of Leon's actions he's realising that he can't just carry her and sure, this chapter he was more in line with setting it straight it's because he feels terrible for having Oliva as the mess she is right now. He's stunted her growth at the cost of an easy life, of course it's gonna be dumb here as in the end they are still kids, leon only got this carry nature from his previous life and well Oliva beforehand didn't know how hard her life would be in the school. She's a mess, He's a mess they all are a mess, but what matters is how they eventually solve the misunderstandings.