Linux/Windows (historically) were straightforawrd, each tool did exactly what it said it would do, and it was up to you to learn how to use the tools available.
On linux/windows, if a button was "capture image", it would just capture the image on the screen. On a mac a "capture image" button could do anything from displaying the image on the screen, to saving it in a photos folder, to saving and syncing it to an iCloud account. Whatever the apple PM decided the most common use case was, and god help you if you want to do something different.
If you've been in the mac ecosystem for a while, you've grown used to this and don't notice any longer. You may even occasionally express happiness when a function does something unexpected and helpful!
If you're coming from anywhere else, its unbelievably painful.