I imagine this is like how microwaves put restaurants out of business, how TTS obviated literacy, how the automobile age made it unnecessary to walk, how Zoom caused every office to close, how helicopters put mountaineering firmly behind us, Amazon obsoleted brick and mortar stores, and payment cards made cash disappear.

It's not only ahistorical to fail to consider preferences and politics, but it's also an indictment of the author's ability to judge the quality of a machine output versus that of a competent person. No doubt that like any of the examples above, some displacement of resources and effort will happen. But that doesn't indicate that something as central as "thinking" (lol) will fade into the past.