@mommunism
Though what you are saying is right, the point is there's a limit to it
In this manga's case, Momo and Banri are seeking a bond and counseling from Jimi
Sure they can expect tact and some kind words from him, but as he stated he's not their parent he isn't supposed to look for their welfare
If they can't have normal relations with people around them, he isn't supposed to substitute as a friend to help with their loneliness