the point of a bug report is to let you know something is going on, to provide context useful in tracking it down, and tracking for the eventual resolution.
as they years tick by, some bug reports are counterproductive because they are unclear, dont give _any_ diagnostic information, or are no longer relevant because the codebase has shifted.
its great to say for each of these issues we should spend a day or two trying to reproduce them - but its really not the best use of time.
we're not talking about capriciously trashing useful bug reports. we're trying to lower the noise floor so that the actionable bugs stand out and are more likely to be dealt with.