I agree. Dominion voting machines weren't switching Trump votes to Biden, yet we spent how long on that canard? And once one of your theories are blown out of the water like that, it removes any shred of credence in any other theories.
I think it's actually a damn easy case to make. We can point out how European countries are uniformly much more stringent about absentee voting then we are. We can hammer why is it that we all used to know the night of the election who won, but sometimes we now don't know until a week or two later? We can point out that if you know you're not going to be there for an election, there is no reason you have to wait until the day of or a couple days before the election to mail your ballot. It's your responsibility to mail your ballot early, and if it doesn't arrive by election day, then it is not going to be counted.
I think they should have been a prime focus of Republican since the election, but it just hasn't happened. Very disappointing.