Like I said in the original post, I would not have posted this letter had I believed this to be a one-off incident. But I have seen THREE such incidents in the past week, including one incident of a literally encyclopedic shipping company tagged for an A7 speedy deletion. None of these nominations appear to have been made in bad faith, but I think they are all badly misguided.
Tagged, but not deleted? Sounds like the system is working, then. We don't expect everyone to be able to make good judgements about which articles to delete and which not to, that's why the delete button is restricted to admins (who are supposed to have demonstrated good judgement).