I'm not sure that the problem is admins - I go
through the A7 noms and
delete maybe 2/3s of them, and a good chunk of those I do delete
aren't A7s, but are copyvios, spam, what have you. It would be nice
if new article patrollers understood the point, though.
And that is why the delete button is only available to admins. If more
people were capable of correctly determining whether or not an article
should be speedied, more people could be given the delete button.
While it would be nice if new article patrollers would tag things
correctly, it's not a serious problem. The speedy deletion procedure
is designed to compensate for people that don't know what is and isn't
speediable by requiring an admin to make the final decision.