In the current AI mania, there's a lot of due diligence simply being ignored. Plenty of "Well humans make mistakes too!" going on here on HN too.
Risks are not binary. Most people are not idiots. They do understand that LLMs aren‘t thinking humanly or 100% logically. You are talking about some sort of faith, I think this is more about trust, which is built on observations. Statistically, the outcomes of LLM work may hit the goal quite a lot. More of that in the beginning of the journey than in the end. For many reasonable people that becomes a trap, where minor, acceptable deviations accumulate into a fireball. Still, saying that LLMs are failure with inevitable fireball at the end and giving up is a trivial and stupid solution. Staying within razor-thin distance from that fireball and managing to deliver a working solution is what everyone tries at the moment. This is how it always happened and always worked. It‘s the art of engineering.