I don't think it's so much a "misunderstood" statistic as much as a number that people (like the commenter you are replying to) deliberately trot out to use as evidence for their position because they are depending on most people being statistically illiterate.

To be clear, I totally agree with your points, I just think this is more of a case of "lying with statistics" than being a misunderstanding.

I think in this case Hanlon’s Razor very much applies.

"Never attribute to malice that which is adequately explained by stupidity."