That 0% platform royalty was on top of the $300 flat fee for the Windows operating system (or however much, I never ran Windows myself), whereas iOS is technically free (no fee for major updates). You’re paying for the OS/platform one way or another.
Very few people bought Windows separately, its price was bundled with the hardware sale just like it is with iOS. This is a completely moot point.
You could try to argue that Apple give more value by supporting longer, but then again you would be completely wrong (some hardware manufacturer are not super good at supporting their stuff for the very long term, but windows in itself has a support timeline way beyond anything Apple ever did...)
