One company doesn't need to do everything. But 100-1000 smaller companies, each taking on a piece of every-day work that people are paid to do and replacing it with AI, is definitely doable and can pay very well if deployed at scale. It doesn't have to be perfect all the time either - just cheap, fast, and good enough. As it always has been.
You didn't really think they are training vision models so they can just drive your car around, or that they are training robots to perform physical tasks so they can just use them in factories, did you?