LLMs produce code faster than humans are able to check it. Today's systems are able to generate thousands of lines of code per day, no human team would be able to keep up with them. The problem, in my opinion, is the way LLMs are used. An LLM reasons and makes mistakes according to the logic it was created with, but different LLMs reason and make mistakes in different ways. I'll give an example: take 2 black boxes, each one with 2 inputs and 1 output. Inside, the boxes work in a different way: with the same inputs the outputs are different. The real key is to use the method of adversarial development: this reduces to a minimum (even if it doesn't eliminate completely) the possibility of errors. So to humans the task of checking the output, and to have quality output you need to spend, and a lot, at least 2 frontier LLMs. But the question is: is quality as a goal an expense or an investment?
"Quality", as you're referring to it, is often a strict requirement expected and enforced by regulation and contracts.
In the past, I could have just easily said that there's more code out there online than I could ever hope to write. There's simply no value in gluing that code together mindlessly or even probabilistically. All the value of code is in gluing it together intentionally as an organization. The value is in knowing the precise results including all side effects.
Let's call this type of AI development what it really is. It's an attempt to jiggle the wrong key in the door. You're trying to circumvent existing standards for profit and then launder blame for it.