Realistically, Kenobi could be set exclusively on Tatooine, and I’d have no issues if that was what they did. The problem is that they chose to set so much of Mando and BoBF on Tatooine, also. That was the mistake. People are getting Tatooine fatigue now, right when we’re getting a show where it actually makes sense to have Tatooine.
And Tatooine is supposed to be a backwater, anyway. It’s meant to be the boondocks of the galaxy. It’s important on a meta level, but not in-universe.
Ugh…it made no sense for Han to be on Tatooine in SW77 if it was the home base of Jabba and he had a price on his head. He was obviously supposed to be laying low on a backwater planet. Tatooine is the wild west with Mos Eisley acting the part of a small frontier town.
Everything is relative of course. If Coruscant and the other planets of the Core Worlds are the equivalent of a developed and urbanized first world country on Earth, then a “small frontier town” in the SW Universe might be huge by our real world standards. But the point of it being a backwater gets lost if you show that like the Special Edition, the prequels, and I guess these new series are showing.