Creating "fewer" isn't helping. Creating "better" would be helping, but lots of the editors don't seem to be doing that. There seem to be large herds of roving editors who pop up any time a new article appears to instantly tag it for deletion. This is annoying, discouraging to contributors, and a complete waste of time.

Nobody cares about the average quality of a randomly selected set of Wikipedia articles; it's the ones people actually find when looking for information that they care about, and those are not randomly selected.

As has already been pointed out, a mediocre article on a trivial subject just sitting there is *harmless*. Having that mediocre article on the trivial subject is *better* than having *nothing* on that trivial subject, if anybody ever looks for it.