Making users feel better is one of the usefulnesses of this technology. Factuality and scientific rigor are not something text generators are capable of due to the nature of the technology itself.
I would instead argue that being overly agreeable and not challenging the user may conflict with making the user feel better long-term.
Search engine is one of my main uses. Traditional search engines are worse than they used to be at a basic text search, and ChatGPT has the added bonus of being able to parse complex text and “figure out” what you mean when describing something that you don’t have a name for. You have to ask it for sources rather than just reading whatever it generates, and/or do traditional searches on the keywords it provides.