I built my own computer, I will probably continue to build my own computer in the future. I also am very sympathetic to anti Apple arguments framed in the context of their proprietary standards which just seem obnoxious.

BUT.

Neither of those imply to me that people should be building their own computers. My life revolves around computers, either at work, or in my primary leisure time. I am well incentivized to learn more about them. My mom's life does not, it revolves around her garden. My best friend's life does not, it revolves around his wife and son. Could these people learn to build a computer and get a better one for cheaper by building? Yes. Would they rather pay someone or some company a small premium to build it for them so they can live their life? Yes.

This also pertains to the car example leading the article, as well as the existence of professional accountants, stock brokers, paralegals, lawyers, librarians, dietitians, electricians, plumbers, arborists, etc. I could do anything I want for cheaper by putting my own effort into it, but life is way too short to do everything, especially things I have no interest in.