I had earlier tried to reply "You're right. I'll go for a walk", but got rate limited.
--
How a cast ballot's votes are counted is just one part of ballot processing.
To citizen's, marks on paper seems like a pretty straight forward thing. Like everyone else, I just marked my ballot and dropped it in the mail. Voila! How hard could it be?
To the election admins, poll and mail ballots are very different things.
Closest analog I can think of is "autonym".
Citizens think about the "what" and the admins think about the "how".
Poll ballots and mail ballots will never be comingled.
Poll ballots will never be "enhanced" or "duplicated".
Central count opscan machines are programmed differently. So they generate different reports. Which must be collated differently.
Signature verification is done differently.
There are many more failure modes with mail ballots. IIRC, my jurisdiction records 30+ different kinds of errors.
Mail ballot processing is a sausage factory. You gotta see to believe it.
But why am I telling you all this? I've had this same convo with 100s (1000s?) of people over the last 15 years. And I'm the conspiracy nut for daring to explain to people how their elections work.