Just means the maintainers haven't gotten around to fixing it/implementing it yet, nothing wrong with that - they don't owe anyone a timeline for fixing issues.
The only way to fight the stale bot is to constantly spam your issue with "bump" comments, which nobody's going to do (and if they do, surely the maintainers will just complain that you're spamming, and rightfully so).
So if the maintainers don't have time to deal with your issue within X months, it just won't get fixed. They won't even be aware that those issues are still there (because who goes through closed issues looking for stuff to do?).
And so I hit google for an issue I'm having with Project X, stumble upon a "closed" issue, scroll to the bottom, and see "closed by stale bot". WHY IS IT CLOSED WHEN IT IS STILL AN ISSUE.