Call centres exist because people can’t get the help they need by searching. Take away call centres, and you’re just making it more difficult for customers.

You’d be surprised how often we can automate a customers enquiry with ML (not even generative AI). Humans are still there as a fallback, but it’s a way better experience to give instant help to the person if possible and then put them into the queue if they have a more complicated problem. Searching is not really in the same context as automating customer queries, although I guess it could depend on the domain to an extent.