Touchscreens are the worst interface option. The feedback of feeling a button, or anything made for the job, is better than typing without specific feedback onto a screen. It won out because of you don’t have a set interface it’s bettor.
Now for search, chat gpt will likely always be less reliable than a list of results you can vet yourself for content and source.
That said… I don’t think people care about truth that much these days so one response that feels correct is could be good enough for most. Terrifying times we live in folks.
I can understand why some times you might just want a chat response to a question rather than a web search.
But I swear that if I even suspect Siri's response is influenced by advertising or endorses a product, I will take the homepod and punt it down the street.