You don't think the staff at a polling place know whether the thing they're submitting to be counted is the printed ballots, or some other output of the ballot

You don't think the staff at a polling place know whether the thing they're submitting to be counted is the printed ballots, or some other output of the ballot marking device? The article you linked doesn't seem to have any connection to the flow where a computerized machine helps mark a ballot, drops it into your hands, and you can see and review it before dropping it into a box to be counted.