I think you can say if human engineers still exist, it's hard to claim we have AGI. If human engineers have been entirely replaced, then it's hard to claim we don't have AGI.
By the definition above, it is possible to have AGI that is also much more expensive to run than human engineers.
Because they are doing most of the economically valuable work?
By the definition above, it is possible to have AGI that is also much more expensive to run than human engineers.