I’m happy they were caught.
I think, unfortunately, this is one of those types of things that when you factor in the time and resources it would take to catch every instance, it's probably a case where for every one you catch, there's more that you don't.
For the record, I don't think there's anything to suggest that the level of improper/fraudulent voting would've changed any election results.
However, I also don't buy the, almost comically low, numbers that they release to try to re-assure people.
I think this is more like drunk driving, one of those things where due to the sheer volume of people driving, and the limited amount of people policing it, it'd be nearly impossible to know exactly how many people were doing it.
For instance, last year, Cleveland ramped up targeted enforcement of drunk driving laws. They ran a newspaper article stating that they made 16 apprehensions for DUI in a single Saturday night. Does anyone actually believe that those were the only 16 people driving under the influence on a Saturday night in a major city?
Same mathematical and human limitations applies to this.
You've got 150 million people voting, and only about 800,000 poll workers policing the process (with varying aptitudes and "sharp eye for catching things that appear to be
off". Despite their absolute best intentions, they're not going to be able to catch everything.