Why? Aren’t there many vendors offering this technology?
Yes. And none of them are reliable. LLM "hallucinations" are implicit to their structure and function, you can't just tell them to be honest.
inb4 "humans aren't reliable either." You, person typing that very response out right now, you are part of the problem.
Reliable Artificial Intelligence? Other than very domain-specific applications, I am not aware of any.