I’m less concerned with the in-universe logic of leaving Luke on Tatooine, which I’m fine with. I just think that making Anakin on Tatooine a major part of the story is an out of universe decision that makes the world seem smaller.

The virgin birth, step family, having to leave to become a Jedi thing also makes all of it wonky. It would be a lot more straightforward if

Owen was Anakin’s actual brother, or at least his friend, and they grew up together. Maybe they’re not even from Tatooine natively but they ended up there for some reason.
You could become a Jedi anywhere and didn’t have to fly to Coruscant and stay there permanently. Anakin was a Jedi on Tatooine and then when the Clone Wars broke out he decided to leave on his damn fool idealistic crusade.

Otherwise it’s like Channel72 said. None of them have enough time together for their comments and actions to fit what actually happened.