Nope, wrong on all counts. You need to delete stale issues, it's no good having an endless backlog of someone's nice-to-haves that they no longer even care about.

And, the "whole idea" of logging issues is not to see how long they are open for... it's to, you know, log issues, because they can't be fixed instantaneously. Measuring how long they are open for is just a pointy-haired boss side effect, because those are the kind of idiots that would think that kind of metric means anything.