I still largely reject the code completion complaint. Specifically, it is very common to know what columns you want before you know what tables have said columns. This is especially true on normalized schemas where you are almost certainly having to do some joins to get all that you want.

So, does it somewhat complicate the logic? Of course. It is by no means impossible, though, and unless you are using super generic column names everywhere, the search space for what tables to suggest will be helped by knowing what columns you are looking for.