I definitely agree with you on this. I think somewhere in the middle-ground is perfect, obviously.
I think I should be able to ask your chatbot how their day is going, but I don't think I should be able to shitpost with it for 3 hours.
The reason I bring up Chatbot is because they seemed to at least have the conversational part figured out.
Also, Siri is really not such a part of this conversation because it is honestly the only chatbot that I can think of that accomplishes a portion of what we're talking about here.