And I challenge the yufa poster in saying that:

An Oral English teacher, as he paints it, is not a real teacher but a teaching assistant if he can teach Oral English only.

I've never gainsaid that. I wouldn't gainsay that at all. A 'teaching assistant' will do nicely. And China needs them.

Most ESL jobs outside China do actually require applicants for an ESL position to be able to do more than just that

I dare say, more's the pity.