I think this often comes up when one person is talking about personal experience, and another person is talking about general advice.

One person's anecdote does not necessarily prove any larger point. They might have gotten (un)lucky, live or work in a particular environment/context that doesn't apply generally, etc.

On the other hand, dismissing someone's anecdote because you have some Larger Point axe to grind is also a bit crap (:

This isn't my experience.

You must be using a different Internet