Go look at the numbers, particularly Georgia, Wisconsin, and Arizona. Biden won those states, but by a razor thin margin. If he had lost those states, he wouldn't have won the electoral college. It would have taken less than 50,000 votes in those states flipping to Trump to change the outcome of the 2020 election.

Of course, that's just the electoral college. Biden won the popular vote by a pretty comfortable margin.

It took the better part of a week for the results to be conclusive.