Every polling place and every vote-counting center is open to observers from both parties, by law. Your idea that one party is shut out of this system has no basis in reality.
There is a lawsuit right now in Georgia over the decision by some locations to accept ballots over the weekend without GOP observers present. Counting without bipartisan observers happened frequently in 2020.
Also "observers" weren't mentioned in my original post. Just because someone watches a count is irrelevant to my original points.
You mean the one that was rejected? The lawsuit was wrong legally and morally— these are people who are eligible to vote casting their vote in a more secure manner than mailing it in, and doing so prior to election day.
There's just no moral defense of rule-lawyering to throw out valid ballots or turn away voters, and judges in red and blue states alike aren't having it.