I think comparing the use of contractors to the use of cloud services is pretty disingenuous in this context.

The reason that "one-person company" is emphasized in the title is because people will expect to find a list of technologies that make developing and maintaining all of the tech required to run a company do-able for a single person.

Advice about which cloud services to use is exactly what I would expect to find on such a list. Hiring external developers is exactly the opposite of what I would expect to see, and kind of undermines the premise.