> An entire human development up to the age of intelligence you are looking for

I've also found the lack of development time consideration a weakness in the AGI literature I've read. We can create intelligent humans now, but it takes not only reproduction, but immersion in our world and societies for something like 12-18 years for a fully intelligent agent to emerge. Maybe if some future DeepMind algorithms could inhabit a complex world like you find in Skyrim for a decade or two, you'd get something interesting.