Letting them get away with brazen cheating will only encourage them next time. And the time after that....
I would argue further that this election has decisively shown that our entire election apparatus needs to be cleaned up. This is the time to do it. This alone is enough reason to keep pushing.
But there's more. Even if Biden still wins, it is nonetheless important to audit all the close states to prove to the people that the result was correct and not stolen. To do less is not only unacceptably lazy but will leave a dark cloud of illegitimacy hanging over Biden (or whoever it is).
Lastly and perhaps most important of all, if you are allowed to have your way, then half the country is going to feel cheated and conclude their votes were stolen from them. My sense is that these people are sick of those of you who regularly just shrug your shoulders at Democrat malfeasance. I further suspect that, given the magnitude of this event, this time someone(s) is going to do something to try and remedy this or to seek revenge. I would prefer to not have that happen. The best way to do that is to fully vet the whole thing.