Do you have any evidence that teachers are all using “automated teaching services”? I’ve never heard of such a thing.
Like I said before, we don't even recognize the existence of general teachers anymore, with the word under typical use now only referring to those who work at schools for children.
You have not heard of automated teaching as a thing because we invent names for automation. The automated kitchen servant isn't called an automated kitchen servant, it's called a dishwasher (among others).
Likewise, automated teachers are not called automated teachers. They are given names, depending on the teaching method at play. Automated teacher is used here as a generalization as the specific automation is immaterial.