The attack vector isn’t the tabulation, it’s the mail-in ballot sleeves. The identity of the voter is on the outer envelope which is separated from the ballot

The attack vector isn’t the tabulation, it’s the mail-in ballot sleeves. The identity of the voter is on the outer envelope which is separated from the ballot and destroyed after their signature is checked. An attacker could insert manufactured ballots to be tabulated after this process and there would be no way to know if they are legitimate or not - they’re anonymous now too so you can’t check with the voter and the voter can’t verify their vote. You can recount the ballots all you want if this attack occurred, because the fake and real ballots would be indistinguishable and unauditable.