Although Apple has also made a mistake IMO in not having a proper package manager in spite of hiring the writer of Homebrew at one point. probably less important than it used to be but not all roads lead to Apple apps or the apps of a few other companies.
The fundamental thing people need to realize is that package and app are different abstractions. They are not one to one related and they are not orthogonal. Distros deliver some open source apps as packages. But thats not the same as delivering apps.
