Yeah, but who knows why they aren't listening to you? If they could fix the problem, but they don't think it's a serious issue, they're not motivated to fix the problem. But if it's serious enough that someone quit their job over the issue, then they may get motivated to fix the problem before more people leave. Not a guarantee, obviously, but it does make a certain amount of sense.
probably doesn't help that's not what I wrote. I made no such comparison. I did give reasoning why comments made by someone leaving could be seen as a serious complaint, instead of whining, however.