That's a great point, but take it a step further to see how truly ridiculous the Left's bull crap is.
We have totally and highly decentralized elections in this country. We have 50 (+1, DC) separate state elections, not a single massive national one. Every state and DC has their own voting method. All elections are run at the county level. Even within one state, different counties may use different voting methods. Some use paper ballots with an ink punch tool. Others use some form of modern touch screen device. Others have gone to nearly total mail in voting. We have early voting and election day voting. There are literally at least 51 variations and combinations of how people vote in this country.
Combine these facts with the additional fact that upwards of 125,000,000 people voted and it becomes clear that not only is hacking impossible, but also that no single issue or influence could possibly sway all that mass of people to vote one way or another.