The point is that in 2000 in Florida there never was a complete and fair count, because of the determination of the Bushites to stop that happening, and because their opponents gave up prematurely.

It seems likely that Obrador and his supporters are less likely to roll over and submit than Gore was.

As and when a full and fair count has been completed the winner can take office, whoever that turns out to be. As ought to have happened back in 2000 in the USA, but wasn't allowed to.