The vulnerabilities of our voting systems are fully documented. They have repeatedly been tested and proven to exist. That is the case in this most recent issue of usage in Georgia. Russian "interest" in the mechanics of our voting systems has been fully documented by our top intelligence agencies. So have their many known "probes" in that regard. Of course the Russians aren't the only ones with the means or motivation to exploit vulnerabilities in computerized voting, it doesn't take a nation state to pull that off, but they make for a good case in point. One could well say that the Russians never launched a proven nuclear missile attack against the U.S. also. So does that mean we shouldn't waste billions of dollars developing anti-missile attack defense systems?
The Dutch had national elections in March, with rightest nationalists threatening to win and undermine N.A.T.O. Here is how Holland reacted to potential Russian meddling in their election:
"Dutch will count all election ballots by hand to thwart hacking"
"Ministers want no repeat of US-Russia controversy in the March poll that could see Geert Wilders far-right party win power"
https://www.theguardian.com/world/2017/feb/02/dutch-will-count-all-election-ballots-by-hand-to-thwart-cyber-hacking
"Dutch authorities will count by hand all the votes cast in next months general elections, ditching vulnerable computer software to thwart any cyber hacking bid, a senior minister has said...
...Plasterk told parliament that fears over the vulnerabilities of the software used by the countrys election committee had raised questions about whether the upcoming elections could be manipulated.
He insisted in a letter to MPs that no shadow of a doubt should hang over the results of the parliamentary polls, which some analysts predict could result in a five-party coalition."
Those silly Dutch, right?