Really? You don't think anyone that uses these don't think they are sentient?

Sure it's not like the people designing these are prone to make-believing the AI for sentient too, right?

You are coming at this from your perspective which knows them to not be real. That's not gonna be how the average moron thinks and there is more of them than you think. And they absolutely believe their is a tiny sentient brain somewhere in there that is alive. I'm all for people doing what makes them happy but also this is a loneliness confirming hole to get trapped in and absolutely opens doors to influence people through their imaginary friends that they think they can trust.