The sheer logistics of it all is more than could be pulled off.
Looking at Georgia.
Biden won by a tad over 11,000 votes.
That is 11,000 ballots, which were 3 pages each. So, we are talking about 33,000 pieces of paper. Now, they had no way of knowing how far ahead Trump would be so they would need at least twice that many to be safe, so now we are talking about 66,000 pieces of paper.
That is 13 cases of unopened, unprinted on paper. But, these were printed on ballots unopened, unprinted on paper, which would take up twice as much space. Where were these 26 to 30 cases of paper hidden and who moved them without anyone noticing? We are talking a good 300 pounds or more of paper.