Thats because there was fraud, Trump even won California. .... just kidding.
It has always been about the mail-in ballots. The normal procedure of requesting a ballot first was eliminated in MI, PA, and GA. Ballots were sprinkled over the states, causing an impossible situation to tracking sent/received and auditing. But worst of all, and this is what most of the affidavits from Rudy seem to state, that signature checks were purposely dropped.
So, Barnes (video above) seems correct. After the 2000/FL/Gore incident, the idea of risk limiting audits, WITH signature checks, was an agreed upon way to approach situations like this. I don’t think it is unreasonable to get these checks.