I find it so funny to think about how in-universe people expected Obi-Wan to be the hero of A New Hope. He's this great General from the Clone Wars, a brilliant warrior and tactician - seeking him out is this very significant hail mary. And instead of swooping in and saving the day like he used to, he makes this totally unknown kid Official Protagonist in his stead and swaps the expected Deus Ex Machina for a Hero's Journey. It's so bonkers. People thought Obi-Wan was their (only) hope and bam, he hits them with the new one and peaces out. The opposite of main character syndrome.
It's like he read the script and went "oh dear, you're all mistaken, this story isn't actually about me," and everyone had to trust him on that.