That statement was only denying the president’s assertion that there were “millions” of fraudulent votes in 2016. That number is obvious hyperbole and of course inaccurate. But that in no way denies that voting fraud occurs in every election.
The very reason that the fraud is so unquantifiable is exactly because anyone can walk into a voting precint and claim to be anyone else and fraudulently vote in their name with no ID. And no one might ever know. When such fraud occurs, the vast majority of the time it goes undetected. Which is why ID should be required to vote. Just as it is required to fly or go into many buildings.