I wonder how one would open two images side by side for soft proofing within the App Frame. I suppose it might be possible, but definitely more time consuming than without the frame. Again, my opinion only.
I said how in previous post. You tile them. Window>Arrange>Tile is the menu navigation or assign a keyboard shortcut for whichever variations of tiling you want. Much faster/easier than dragging windows around. Not an opinion, sometimes some methods are simply easier.
You can also drag tabs out as needed and having them floating around exactly as if application frame is missing without seeing clutter/other programmes behind PS. So using app frame has zero disadvantage. All this stuff has been there for a very long time now.
And by the way, I never "click on the desktop" unless I have a reason to do so.
Must be nice to never make a mistake and accidentally click outside of floating images, very easy with trackpad or graphics tablet.
One of the most endearing aspects of the OSX UI is its simplicity and intuitive nature. Not nearly as clunky as the PC. And of course I must mention once again that this is strictly a matter of opinion, as is your post. Isn't LuLa wonderful?
When people say x is more intuitive than y, what they almost always mean is they use x and are unfamiliar with or haven't learnt to use y properly. Both OSX and Windows are very good in places and dumbfoundingly stupid in others. Between the two of them you have one awesome bit of software.
Software being 'intuitive' to use is also not necessarily a good start point for design. You design it to be the most functional which makes it easier, even if that means using new paradigms which people then claim is not intuitive as they have to invest some time in learning a new way of working. In reality it's simply different from their previous software. Some people got freaked out by Lightroom as it was so different from what came before, but because Adobe started afresh with a completely new paradigm , they developed a piece of software far more suited to modern photography needs and slotted in where PS was starting to struggle.
My problem with Apple software is that all too often it is simplistic and not simple. This is so Apple can claim it to be easy to use, except in the process it becomes far harder to use. It's easy to claim something that does very little is easier to use that something incredibly powerful and versatile is simply because there are so few options. It's like Henry Ford making choosing your car colour very easy, as there was only one colour. Not having an 'add to playlist button'
in iOS in the music app was a classic example of Apple's button avoidance made for a dreadfully difficult workflow for something quite simple. Thankfully very recently fixed. That omission and not being able to queue tracks in Music/iTunes were things that should be in V1 of such music software not a decade or so later.
If you think using OSX is intuitive try the last couple of iterations on dual monitors with full screen or full desktop and swap between various open programmes and windows using the keyboard. Ridiculously difficult to do. You basically have two options for how it works, broken and useless. I'm stuck on 10.8.5 because of this mess. Windows handled multiple monitors far better last century.
See if you can follow how to swap windows/apps....
****To summarize the set of keyboard shortcuts -
If I have two windows from different apps I can switch with ⌘-tab.
If I have two windows from the same app I can switch with ⌘-`.
If I have two full-screen windows from the same app then ⌘-` doesn’t work but I can switch with ⌃-←→ (or ⌘-←→, I chose ⌃-←→ to avoid conflict with browser back/forward shortcuts).
If I have two full-screen windows from the same app on different monitors then ⌃-←→ doesn’t work but ⌘-` does.
If I have two full-screen windows from the same app on different monitors and the target window is currently not in front then ⌘-` and ⌃-←→ both fail to work. I have to ⌘-tab to another app that is on the target monitor, then ⌃-←→ to the target window. Correction: ⌃-←→ scrolls through spaces on the original monitor, not the target monitor, so there's actually no way to do this that I know of.
Aside: if I enable the keyboard shortcuts for “switch to desktop 1” and “switch to desktop 2” and use two monitors the shortcuts won’t work if the specified desktop is not assigned to the current monitor.****
Also worth noting is that if you choose to use software full screen it vanishes into a different space, so when you alt tab it now appears missing. There is an option that stops this, however if you do that any software you use across full desktop/both monitors can't be used that way.
Now imagine using three or more screen which is common in video editing. But then Apple seem to have virtually given up on the pro graphics market that kept them afloat for many years. They are a phone company now.