> For now, sure, we're in the transitional period, but in the long run? Why?

Assuming that after the transitional period it will still be humans working with ai tools to build things where humans actually add value to the process. Will the human+ai where the ai can explain what the ai built in detail and the human leverages that to build something better, be more productive that the human+ai where the human does not leverage those details?

That 'explanation' will be/can act as the human readable code or the equivalent. It does not need to be any coding language we know today however. The languages we have today are already abstractions and generalizations over architectures, OSs, etc and that 'explanation' will be different but in the same vein.