Great, I’ve learned statistics (don’t use it though) and with statistics there is a margin of error (can be 10% and it’s still acceptable) however 10% (or even 5 or 1) can decide a race
And to answer your first question, when things “go through the night (like the powerball drawing btw) when you can’t have observers from the “losing” side supervise (due to Covid of course) when mail in ballots just pop up, it makes one a big skeptic (would you accept a result if it happened to your side? I don’t really think you would (then again if my side won I would accept it 😉)
סוף כל סוף no one is going to sway the other side