The problem is that LLM cost is more or less the same for generating some fixed amount of code or it will converge to that soon. But developer costs vary wildly based on the seniority*geographical location. Sure some Silicon Valley architect will be always more expensive than any LLM bills he incurred. But a middle tier dev at an outsource or local cheap shop overseas using the same LLM for the same tasks and same token costs? Eeh, it can go either way really.