Your knowledge of the actual OT turns out to be seriously lacking.
That's funny.

You're cute.
ANH established that Anakin was from Tatooine.
No, it didn't.
You mean the scene in the dining alcove right before the sunsets, after Luke left the table?
Beru: Luke's just not a farmer, Owen. He has too much of his father in him.
Owen: That's what I'm afraid of.
All this dialog establishes is that Owen and Beru Lars were familiar with at least some of the exploits of Luke's father. It doesn't even definitively establish that either had met Anakin personally.
Or maybe you mean what Ben told Luke?
Ben: That's what your uncle told you. He didn't hold with your father's ideals. Thought he should have stayed here and not gotten involved.
You mean in the same conversation where he told Luke that his father was dead? So, some point-of-view wiggle room on whether Luke's father is dead is allowed, but everything else Ben said must be absolutely 100% true? Right. Sure.
(source =
http://www.imsdb.com/scripts/Star-Wars-A-New-Hope.html)
By the way, if Ben was really telling the truth here, when exactly should Anakin have decided to stay on Tatooine and not gotten involved? When he was six years old? Please. Precisely what higher ideals was little Annie following at that time? Oh, and as far as I recall, Owen Lars had never met Anakin when Anakin left Tatooine to join the Jedi; Owen didn't even appear at all in
The Phantom Menace.
Edited to Add: Ergo, what Ben said here in the OT doesn't jibe with what went down in the PT, which contradicts the idea that one can take this dialog on face value.
Also, there is another interpretation of this little bit of dialog. It could just simply mean that at some point Anakin might have had the opportunity to
move to Tatooine, say with Padmé, to raise a family,
and leave the Republic behind altogether. That would have been an ironic place to hide Luke, where Anakin might have moved to escape the war and his fate, but didn't. Tatooine not as the place of hardship where Anakin was born, but the rugged frontier to which he might have escaped, but didn't.
Edited to Add: This would have supported the idea that the OT is about Luke picking up the torch dropped by Anakin in the PT, which in fact the OT seems to be. I agree that it does not make sense to think of the OT as a narrative revolving around Anakin. Clearly, the OT revolves around Luke.