I have had that thought since S2 Mando end credits. My first thought was “you can do that?” It is like if I went into business shot the owner and sat in his chair. Should I not know what his accounts payable, receivable, budget, ytd budget, overhead, inventory, knowledge of customer base, when customers order how often do they order etc before I stake the claim “I’m running the show now” ?
Some of that can be waved away as typical Star Wars glossing-over. But not all of it.
The writers leave it very unclear what a 'crime boss' or 'daimyo' actually does. What they control other than supposedly the mayor and what the 'boss' actually has in terms of business interests. If Bib Fortuna was following the Hutt business model it sounds like slavery, assassination, drug running, contraband, miscellaneous smuggling, violent extortion etc. -- although for some reason the other Hutts left him alone instead of installing themselves in Jabba's place.
(Rule
that with 'respect'.)
Presumably Tatooine was of strategic value only to a criminal element that wanted to avoid Imperial, and later New Republic scrutiny, as it was originally portrayed as remote, unimportant and undesirable (before Lucasfilm stuck it in every single Star Wars thing ever).
If anything, recall that Tatooine in ANH was just short of post-apocalyptic, which makes sense in the wake of large scale galactic warfare that would have hammered interplanetary resources, gutted trade and economies in some regions due to destruction, depletion, appropriation of resources by the Empire along with local genocides or mass migration. Think North Korea or places in the Middle East at various times (Beirut, Iraq, etc. etc.)
The planet was more or less a hopeless little backwater town with a truck stop and a couple of biker gang clubhouses. (No Scooter Kids please).
What's the population of Mos Espa? Mos Eisley? Tatooine? Is it a fairly recent colony? Are 'moisture farmers' mere subsistence farmers? Is there a functioning economy? The 'mayor' -- is this an elected official? How often are elections? The questions just keep piling up.
Of course Lucas himself scaled it up considerably in The Phantom Menace, and who knows what else in the EU era.
That's one reason the OT worked in spite of its shortcomings. It kept things simple, left a lot to the imagination without open-ended and half-baked exposition.
I suppose the flashbacks may provide a motivation for Boba Fett walking into that palace and blasting Bib Fortuna -- presumably he's connected to the Tuskens being exterminated.
But 'taking over business' -- whatever that business may be -- doesn't really make sense in the context of a reformed and sympathetic former bounty hunter. And I doubt it will by the time this strangely amateurish project concludes.