When people ask what I do for a living, my response is "software engineer". Not "programmer" or "coder", because the actual programming is only part of the job.
The big concerns for software engineers are reliability, maintainability, and scalability. Using LLM-generated code without reviewing and understanding it is antithetical to all three of those big concerns. Personally, I find that the amount of review and revising it takes doesn't end up saving me any time at all compared with me writing it myself.
Almost anybody can build a bridge given some materials. But there's a reason we have licensed engineers who review and sign plans for them. If your methed out neighbour built a bridge in an hour by himself, would you drive over it?