Hence the "not obviously require" bit: Some portion of those "simply gluing things together" will not actually be simple in truth. It'll work for a time until errors come to a head, then suddenly they'll need a professional to rip out the LLM asbestos and rework it properly.

That said, we should not underestimate the ability of companies to limp along with something broken and buggy, especially when they're being told there's no budget to fix it. (True even before LLMs.)