While Anakin has just described a typical day at the beach, he’s also talking about the root of his disdain for the planet Tatooine. If he doesn’t have to go back there, he’s not going to. Why spend the time and energy hiding Luke REALLY WELL if you can hide him in plain sight in the middle of a sand dune?
Yes, this is a hilarious fan theory. Because of course Anakin isn’t going to subject himself to sand again. But along with being funny, it also cleverly explains why Luke was never discovered, and why Anakin never bothered to check there in the first place. Because, sand. Sand is just downright irritating, friends.