I have no idea what the claim about "most secure election in history" is based on.
I'm responding to the false claim made by Trump and others about numbers of absentee ballots rejected in Georgia. The rate of rejections is similar this year as in previous years.
An election is either more secure, less secure or equally secure. It can't be all three at the same time.
Personally I suspect this elect was very similar to 2016, and unless it too was the most secure election in history then we got a small problem.