When we moved from horses to automobiles, we needed fewer farriers and more people to design, manufacture, and repair cars. We needed refineries to make gasoline, etc.
My sense is that AI will lead to different jobs, but not necessarily fewer overall. Someone needs to design and train the AI, the computer’s suck a lot of electricity, etc.
There will of course be winners and losers. And as stated elsewhere, many of the existing college degrees will be rather worthless.