Strange article. The problem isn’t that everyone doesn’t know how everything works, it’s that AI coding could mean there is no one who knows how a system works.
I read it more as: We already don't know how everything works, AI is steering us towards a destination where there is more of the everything. I would also add it's also possible it will reduce the number people that are _capable_ of understanding the parts it is responsible for.
I am sure engineers collectively understand how the entire stack works.
With LLM generated output, nobody understands how anything works, including the very model you just interacted with -- evident in "you are absolutely correct"