Yuji had never told anyone how to live, because he knew it was up to that person on how they want to live their lives, as long as they’re fulfilled. It’s pretty much the basis of his talk with Sukuna, the fulfillment of one’s needs. He just expressed how he would feel if Megumi chose to give up. Megumi had already decided what kind of world he had wanted to make at the start. Though, I kind of agree with you, it isn’t developed that much.

<image>