By "happen all the time", what you actually mean in, "happens much less often than a coin falling on the edge if you flip it".

And I'm not being hyperbolic - I mean that literally.

The chances of a coin landing on its edge are about 1 in 6000 - https://ui.adsabs.harvard.edu/abs/1993PhRvE..48.2547M/abstract#

Your link shows 1300 total fraudulent votes, back to 1979 out of very roughly a billion Presidential votes alone. The site seems to count every single vote, which probably means several billion votes.

If the chance of fraudulent voting were as high as a coin landing on its edge, you'd expect about 300,000 fraudulent votes during that time.

But 1300 fraudulent votes in 41 years - what an admirable record!

During that same time, over 2000 Americans were struck by lightning. And being struck by lightning is very rare - as an American, you're over 30 times as likely to win the lottery as get hit by lighting.