Why doesn't Apple make chips? Is it because you can't afford mask aligner?

Although Apple has a great demand for chips every year, there is absolutely no need for it to produce its own chips. He only needs to control the design of the chip in his own hands, and can design a world-class chip, and then entrust this chip to some chip foundry companies for production, which can not only reduce the production cost of Apple, but also improve flexibility and reduce operational risks.