> AGI doesn’t mean smarter than the best humans.

Technically no, but practically...

12 year old limitations are: A. gets tired, needs sleep B. I/O limited by muscles

Probably there are more, but if 12 year old could talk directly to electric circuits and would not need sleep or even a break, then that 12 year old would be leaps and bounds above the best human in his field of interest.

(Well motivation to finish the task is needed though)