he means if apple did the same garbo on osx, people would leave.

if you couldn't install cs suite or final cut or whatever, because apple comes with its own default stuff, no one would use osx.

I can't install my own browsers, my own antivirus, my own file explorer, my own shell, or my own applications in iOS as I see fit. but they do allow this on osx.

That if/then is a counterfactual that deserves thought. I'm sure someone in Cupertino is tasked with measuring out the win/loss if MacOS goes full iOS. I wouldn't like that MacOS either, but that isn't relevant to a good decision.

  Pro:
  1. MS Office is basically completely a web app now. No binary install needed. iOS binaries are already present and optimized.
  2. Adobe subscription software is not far behind and iOS versions are present.
  3. Antivirus what? in the iOS model.
  NB. You can install your own iOS shell (if it connects to something other than localhost).

  Con:
  1. Apple has a relatively small business selling FCP etc. 
  2. Apple has a larger business/ecosystem selling App Store shovels/lotto tickets that need dev environments.
  3. Apple's high end use is a halo for lower end Mac sales. If restrictions cripple high end use and they lose the halo, then the aspirational crowd goes.

Your comment, I understand. I still don't think GP's comment makes any sense.

> If Apple treated their bundled calculators, text editors, email software, photo viewers and PDF viewers like they treated their browser, nobody would use MacOS.

Clearly some words must be missing.