Is there a class with this content.

The article Is there a class with this content states:

"Given this requirement for highly structured content and rigorously controlled delivery, behaviourists believed that their technology of instruction could be best provided not by human
teachers but by devices, such as those itemized by Innis."

If this statement is true then all teachers would have been replaced by computers or other technical devices. There are some students who would prefer to learn this way, yet other students would not be able to function, they would need the human interaction to be able to learn.