> Why do we let any random application open its own files and folders at will? The actual selection and opening of files and other resources should be the job of the operating system

This is how macOS works these days with sandboxing. Unless you manually go into system settings to grant "full disk access", apps only get access to files the user has manually selected (through the system open dialog, drag and drop, double-clicking, etc)

People continually decry this as "iOSification of the Mac", "the end of general purpose computing" and "too many damn permissions dialogs what is this Windows Vista or something"