Obi-Wan didn’t let Vader kill him on the Death Star to stall for time or anything, he just glanced over and saw Luke and Leia standing next to each other, thought about the pure unbridled chaos of having to deal with two (2) Skywalkers simultaneously, and said nah i’m too old for this shit let me be one with the Force now.
being an adult is just saying to yourself “this is the weekend i’ll clean my [x]” and then proceeding to not do that because it’s the weekend and you deserve to relax, goddamnit