In the video example, I am kind of baffled that LLM is being trusted to pick candidates for the role. How much guarantee does Google's LLM/agent provide that i

In the video example, I am kind of baffled that LLM is being trusted to pick candidates for the role. How much guarantee does Google's LLM/agent provide that it didn't hallucinate (read wrong info) in any of the steps including parsing job description and than matching that with profile of candidates? I don't understand when these LLMs are presented to solve real life problems as if an LLM is like a sane person doing their job.