I used to not want chat bots because they were bad. I can imagine situations where I would prefer a chat bots over humans. For example, if it's a niche problem that a human would be unaware of and would have to look up, read, and verify taking a long time to respond, I would definitely want a chat bot or a bot assisted human.
You can do it with whatever is claimed as "scientifically approved" and works every time... because the only time one has to invoke such nonsense is if it doesn't really work... so then it has to involve your placebo and biases.
Frederick Matthias Alexander (of the Alexander Technique fame) used 3 mirrors to diagnose and fix his bad posture leading to vocal rsi, so I am certain that this is a great idea. It would be nice if someone came up with a more smarter solution for this.