Good code for a business is robust code, that's functionally correct, efficient where it needs to be and does not cost too much.
I believe most developers who care about good code are trying to articulate this, they care about a strong system that delivers well, which comes from good architecture.
LLMs actually deliver pretty well on the more trivial code cleanlines stuff, or can be made to pretty trivially with linters, so I don't think devs working with it should be worried about that aspect.
What is changing fast is that last point I mentioned, "that doesn't cost too much" because if you can get 70% of the requirements for 10% of the perceived up front cost, that calculus has changed. But you are not going to be getting the same level of system architecture for that time/cost ratio. That can bite you later, as it does often enough with human coders too.
If one compares a single competent software engineer directing a number of agents against a random group of engineers (not necessarily working at FAANG or a YC startup), then those quality arguments are going to be significantly less compelling.