That's not a fair comparison because back then Dana only issued an interim title as a last resort when a fighter was out for years. How serious a title was taken was clearly a priority to him and the only justification was inactivity for years which caused doubt that the current champ was still the divisions best fighter.
Fast forward to 2021 and Dana is now apparently using the interim title as a negotiation tactic against champs. By those standards he might have made one at MW after AS embarrased him at UFC 112 or when MM was refusing to fight TJ. Not that he'd be right(I've argued MM was right) but Dana is way too trigger happy now(not just with making interim belts but stripping interim champs). UFC has a lot of cards to fill and even if the champ isn't doing anything wrong more title fights makes that job easier and he's def pushed the legitamacy of the belts to the back of his list of prioritys.