I'm actually willing to bet good money that it's the other way around and it's you who is in the minority.
(Yes, yes. It is a lame joke. But who uses only one Window at a time? What is the point of that? Though I remember when I used OS X you could swipe left (or right) to switch back to all other apps. So I think that was good enough.)
You're talking about the "fullscreen" feature which I always found very weird. For example, ever forget your video was "fullscreen"ed as you try to alt-tab to it only to realize it's a 4-finger swipe to pull it back up. Making the user have to differentiate will always be bizarre to me.
In the olden days, Mac users would tend to have lots of overlapping windows. Dragging anywhere on the window edges would move the window, so it was easy to arrange them as you wanted - almost like shuffling bits of paper on your desktop (strangely enough) and if you wanted to move something out of the way, you could fold it up (window shade). There was no need for maximising or minimising and "zooming" just meant "make this as large as makes sense for this particular document", not "expand to take up all the space on my desktop"
As OSX/macOS has developed, all that document/desktop-style behaviour has been lost.
I think that Apple thought that many regular users would switch to full screen apps on the Mac, combined with Launchpad (it's just like an iPad/iPhone). But virtually all non-tech-savvy Mac users that I know do not use Launchpad, nor fullscreen apps.
I think the problem with Launchpad as with Spotlight search [1] is that they are not very discoverable on the Mac. Having search in an application menu (like recent Windows versions and some Linux desktops) is far more discoverable.
I guess people don't use fullscreen apps because they equate desktops/laptops to the 'WIMP' interface paradigm.
[1] If I received a penny every time I see even experienced Mac users launch applications by clicking on a Dock icon or by navigating to the Applications folder in Finder, rather than using Spotlight, I would be rich.
Eh? They still do, as of MacOS 10.13.