We more and more turn into cyborgs, wearing all kinds of processors and sensors on our bodies. And we need this hardware and the software that runs on it to be trustworthy.
Being the hardware producer and gatekeeper for trustworthy software to run on it is probably big enough of a market for Apple.
Even more so if their business of getting 15% to 30% of the revenue apps generate on the iPhone continues.
It has yet to be seen what type of company becomes most valuable in the AI stack. It could very well be that it does not operate LLMs. Similar to how the most valuable company in the hospitality industry does not operate hotels. It just operates a website on which you book hotels.