I used to design and maintain chatbots for a living, for a company that among other things sold bespoke chatbots to corporate clients, and I can tell you that the companies KNOW that customers don’t want chatbots for customer service. They don’t care. THEY want chatbots for customer service because chatbots are orders of magnitude cheaper than hiring customer service representatives.
A chatbot is gonna cost what it costs them to employ 1-2 customer service reps, but it can handle basically infinite traffic for that price. The GOOD ones handle the simple questions (your "how do I pay my bill"s and your "what are your hours"s) and then forward the difficult ones (“why is my bill fucked up?”) to a human agent. But I absolutely worked with some clients (who I will not name because I do not want to get sued) that explicitly wanted to avoid letting customers get access to a human agent by whatever means possible.
Also a side note but basically no one lets people cancel accounts via chatbot. They inevitably want THOSE requests to go to a human rep so they can try to talk them out of it.