It's not necessary for a subsequent vote to have the same outcome as the first. The issue is whether the election is secure and people have trust in the system.
So first goal of fakers is to ruin that. It even written as one of main goals in Russian trolls goal books. Find a copy of such book and read it: you will learn a lot.
Once there's no longer trust in the system, you're right, secure voting is no longer a problem.
Which is why it's important to fix this earlier rather than later.
If it's your goal to cast more FUD on the issue, that's your choice. I can't even ask to you be honest about it because that wouldn't be congruent with spreading FUD.
https://en.wikipedia.org/wiki/Australian_Senate_special_elec...