You're actually proving his point : on Windows something as basic as reading PDFs (yes you "absolutely" need that in 2015) requires specific knowledge of obscure names like "Foxit Reader".
I'm not even going into annotating that PDF or adding your signature to it then.
The same goes for : an office suite, a file manager with decent previewing+smart search capabilities, something that quickly resizes/converts your pictures, great photo editing/cataloging software, video editing software, music editing software, e-mail client, a comprehensive development environment (1)
All of the above, which covers almost all areas of what people actually use computers for, comes as standard on OS X
(1) Pages/Numbers/Keynote, Finder+Spotlight, Preview (also your answer for annotating PDFs btw), iPhoto/Photos, iMovie, Garageband, Mail, Unix CLI/XCode
> Yes, you'll have to uncheck some boxes to avoid their bundled software. Big deal.
Hate to say it in troll-ish way but : everyone but lifelong Windows users has higher standards than this.