That's a very good point indeed. In that particular case the diagnostic chatbot is a proof-of-concept to grab attention to the diagnosis+NLP API offered by Infermedica, and also serve as an example app.
This is 100% correct. The chatbot is currently a proof-of-concept and our first take on a conversational symptom checker. Our core business is the Infermedica API and patient prescreening tools based on the diagnostic engine.
Wouldn't a more graphical implementation of the symptom checker, possibly with a tree the user can follow in a wizard style be more effective than a simple texted based chat?