The article clearly states the harm may be things like cardiomegaly which you wouldn't overtly see (until you have an MI at 55). In any case, your subjective experience doesn't outweigh actual science conducted on a significant group of people. The article does make sense, you just don't like the idea because it would mean you might not be as healthy as you think.
That doesn't mean you should stop running, just that it is a decision with consequences like any other.
That doesn't mean you should stop running, just that it is a decision with consequences like any other.