Yes. It was more sane, when:
1. The Applications folder lived on the Dock, so users actually knew it was there.
2. Many applications (much more than today) were distributed via DMG's with instructions that an app should be dragged to the Applications folder.
Without either of these things, a lot of users end up just running an application from their Downloads folder.
Worse, doing it the right way involves on a non-trivial number of steps. You have to (1) open the Finder, (2) navigate to the Applications folder, and (3) then drag the app from Downloads into Applications.
Applications is, by default, in the Favorites bar of Finder. Which is where a user would find the Download folder, granted that Applications is lower in the list, but...
Second, a significant number of programs are installed from the App Store now. Of those that aren't, it's still quite normal to open up a DMG and have two icons: the application, and a link to the Applications folder. Often with a bit of icon magic so the application points at the folder.
Some applications still use an installer, in which case the app lands in the Applications folder, again.
Is this really a problem? I've been using OSX for far too long to be in a position to tell...
Professionally, I can't see how I could ever use "UX" without being confusing, either because I'm using the concept poorly or because I'd expect my audience to misunderstand my meaning.
Disclaimer: I've spent years working on UI (even developing controls, caring deeply about usability) but I've never spent much time specifically working on UX.
[1]: https://www.researchgate.net/publication/221518375_Understan...
Confusion arises because, typically, not getting things done makes you feel bad.
UI is what you see UX is how you use it
Because they used to be easier. I made a post on this elsewhere in this thread.
For installing applications: Apple used to place a stack for the Applications folder in your Dock by default, and you'd use that stack to launch any applications that weren't already in your Dock. It was natural that you'd install new applications by dragging them to the same place you launched them.
I think the current behavior is a fine compromise.