Employees are people. They say stuff. They interact with customers. Most of what they say is true. Sometimes they get it wrong.
Personally I don't want to train my employees so they can only parrot the lines I approve. Personally I don't want to interact with an employee who can only read from a script.
Yes, some employees have more authority than others. Yes some make mistakes. Yes, we can (and do) often absorb those mistakes where we can. But clearly there are some mistakes that can't be simply absorbed.
Verbal "contracts" are worth the paper they're written on. Written quotes exist gor a reason.
In the context of this thread, chatbots are often useful ways to disseminate information. But they cannot enter into a contract, verbal or written. So, for giggles feel free to see what you can make them say. But don't expect them to give you a legal binding offer.
If you don't like that condition then feel free not to use them.