I'm missing something here. First, I thought Steve's point was that the carriage makers did not see "individual transportation" as their business, and they should have--if they had, they might have pivoted like Studebaker did.
So if "most companies are not in the field of Artificial Intelligence", that could mean that they ought to be.
However, I draw a somewhat different conclusion: the business that companies ranging from Newsweek to accountants to universities to companies' HR departments should see themselves in is intelligence, regardless of whether that's artificial or otherwise. The question then becomes which supplies that intelligence better: humans or LLM-type AI (or some combination thereof)? I'm not at all sure that the answer at present is LLM-AI, but it is a different question, and the answer may well be different in the near future.
There are of course other kinds of AI, as you (jampa) mention. In other words, AI is not (for now) one thing; LLMs are just one kind of AI.