This is also one of things that needs to be well optimized to be any useful. Army of agents may get an implementation, but not sure it will be actually useful, and I'm also not sure if optimizing that implementation is going to be easier than more well paced use of LLM where person actually understands what code is being generated.
You seem to contradict yourself. Army of agents doesn't mean the person doing that doesn't understand the code. And optimization is required no matter whether the bulk of the code is written by hand or by the machine. LLMs definitely make things actually doable where previously they were nearly impossible.