I had the same experience with chatbots, but we shipped a chatbot module a year ago that helps with complex config questions by reading and answering based on a Salesforce Experience site.

I was skeptical but it gets a 68 NPS from users, even if we do get the occasional "why are you investing in AI I hate it" coming through the feedback channel.

As ever, the issue is "what problem are you solving". If it's that you want more people to put their hand up and talk to you/order something, chatbots seem like a bad solution. If it's that you have a ton of complex docs that people have to read in order to implement and use your product, it's not the solution but it's probably part of a solution.

If you have the docs public assuming a good search engine you don't need the chat bot since users can use e.g. Google AI.