So no external libraries for anything? Billions of lines of code that duplicate the same thing n-times across an organization?

And the benefit is the obscurity of "no one will know how to exploit them"?

No, thanks.

LLMs have been used to scan binary blobs for exploits already. What would be more effective is a system designed with multiple layers of security so any one exploit is largely useless.

Next: the back doors are written by the LLM!