HelpHub has a way to add a large CTA for that as a fallback. E.g. our own HelpHub implementation has a _Message Us_ button in the bottom to trigger a chat with a human support agent.
However, we do love to use our products! Once logged in, you will see that we replaced the Intercom chat widget with HelpHub there. We still offer Intercom chat as a fallback if you need to talk to a human.
Without knowing that product well, I think the main difference is that HelpHub is not just a ChatBot. It's also a full in-app help center with semantic search etc. The ChatBot integrates with the rest of the features and among other things links you to the sources it used to generate the answers.
I do so too, with quite similar arguments. I have a blog post about learning all VSCode Shortcuts[1] (did the same for PyCharm) and how it evolved my developing habits. Without learning the shortcuts, many IDE features are not usable. So, if you don't learn the shortcuts, you will not start to use these new features. Consequently, learning shortcuts on the go often does not work.
I fully agree also on creating your own cheat sheets. That's why I have developed an entire app around this idea: KeyCombiner[2]!
It let's you create your own collections, practice them via an interactive trainer and spaced repetition, look them up without context switch through the desktop app's instant look, visualize them on a virtual keyboard, etc.