They don't. I have never once in my life wanted to talk to my smart speaker about what I wanted for dinner, not even because a smart speaker is/can be creepy, not because of social anxiety, no, it's just simpler and more straightforward to open Doordash on my damn phone, and look at a list of restaurants nearby to order from. Or browse a list of products on Amazon to buy. Or just call a restaurant to get a reservation. These tasks are trivial.
And like, as a socially anxious millennial, no I don't particularly like phone calls. However I also recognize that setting my discomfort aside, a direct connection to a human being who can help reason out a problem I'm having is not something easily replaced with a chatbot or an AI assistant. It just isn't. Perfect example: called a place to make a reservation for myself, my wife and girlfriend (poly long story) and found the place didn't usually do reservations on the day in question, but the person did ask when we'd be there. As I was talking to a person, I could provide that information immediately, and say "if you don't take reservations don't worry, that's fine," but it was an off-busy hour so we got one anyway. How does an AI navigate that conversation more efficiently than me?
As a techie person I basically spend the entire day interacting with various software to perform various tasks, work related and otherwise. I cannot overstate: NONE of these interactions, not a single one, is improved one iota by turning it into a conversation, verbal or text-based, with my or someone else's computer. By definition it makes basic tasks take longer, every time, without fail.