[TZubiri]

My brother in christ, the function is just that of a salesman, you are pondering philosophical about whether a salesman's actions are ethical.

Company makes a chatbot that sells their product and advises customers on what to buy.

To be fair with you, you are not asking the wrong questions and you are on to something, it's just that it's basic if you are into sales. Read up on the subject, a source I would recommend, although obscure, is Claude Whitacre. I believe in "Sales Prospecting" he talks about this specific dilemma of giving good advice vs selling your product. He argues that a good salesman will give good advice over selling their own product, and that this is beneficial because it creates trust in the salesman and might result in more sales down the line even if the very specific interaction didn't result in a sale.