I guess the Deep State after lots of internal negotiations decided it would be OK if Bush pretended to head up America for a couple of years. And then allowed him a second term.
Gore did not concede until dec 18 and after he had exhausted all legal remedies. In fact the Supreme Court ended it. In Gores’ concession he said although he strongly disagreed he accepted it.
Actually SCOTUS did so, 5-4, along ideological lines. Yet even a CCN study states, Taken as a whole, the recount studies show Bush would have most likely won the Florida statewide hand recount of all undervotes. (https://www.cnn.com/2015/10/31/politics/bush-gore-2000-election-results-studies/index.html)