To be fair, it all makes sense if you a) adopt the view that an application is just a file like any other, and b) remember the pre-network days: to install a pr

To be fair, it all makes sense if you a) adopt the view that an application is just a file like any other, and b) remember the pre-network days: to install a program, you insert a disk, and then just pull (=copy) the program from the disk to where you keep your applications. And with the internet and downloads, the process has not changed much except that the disk is replaced by a disk image. With that mental image, the process seems straightforward enough. And the App store, of course, enables one-click installation as on smartphones. So, I guess the impediments are that people don't know how to deal with disks and disk images, and the idea that one ought to "install" software, rather than just copying to where one wants it.