Well if you can't put faith in one of the last few jedi left. why would you put faith in a 10 year old boy growing up to be able to defeat the Emporer? Based on what? You say i have a narrow view... But how is this idea any better? There is nothing wrong with pushing Nari away. As Obi Wan says, the war is over, they lost. Obi Wan feels they stand no chance in fighting. And i think if you took what we know about Luke and the OT out and looked at Obi Wans motivations, you would sorta question why he was willing to let people die for this kid, which in itself is a risk.