As a software developer for over 30 years I could write election software in my sleep. The only thing I don't have experience with is scanning a ballot but I could learn it.
Here's all you would have to do:
Map all candidates, propositions or initiatives on a blank ballot.
Read a ballot
Add 1 for each area on the ballot that is marked for each candidate, proposition or initiative in the data table.
Then when the election is over, it just needs to spit out a report of the total number of votes the candidates, propositions or initiatives and that's it.
If the machine has an interface to enter your votes on a screen then it is even easier. Create a form. Have the voter check each box they are in favor of. Store that in a data table and then tabulate the results at the end.
That's it. I could understand hackers trying to alter the election results but that code is already in the voting machines. I'm an honest and fair guy. Let me look at the code so I can tell you if it doing more than just adding. There should not be any subtraction functions or functions that transfer a percentage of all votes to one candidate and a smaller percentage to others under any circumstance. All it should ever do is just increment a count. Nothing more and nothing less.
Trump++; or Biden++; (C based language programmers know exactly what that is)
I would think that even if you are die hard election fraud denier then you would want those machines to be examined to put to rest all of this talk about voter fraud. But I seriously doubt anyone on the left even thinks that way. They'll just be good little sheep and follow what the party tells them because to do otherwise would be racist.