I agree writing completely new systems with LLMs is now near impossible to keep in your head, however, the onus is STILL on you the individual engineer. You are mistaken if you think that's changed.

So, if you're pooping out code, and committing it because tests still pass, and that's all you know, you're in for a treat. When an executive wants to know why a b0rked feature lost their department millions of dollars, guess who will have to answer for it, and its not the LLM.

My advice is to find ways to keep on top of how it all works, and if you're the only one who cares, well, then, that makes you even more valuable, not less.