Because Microsoft would be stupid to provide a barebones OS. What would an average user do with that? They install an OS and then spend days with hunting down d

Because Microsoft would be stupid to provide a barebones OS. What would an average user do with that? They install an OS and then spend days with hunting down different apps and configure them so that they can actually start using their device? MS (and honestly, any software company) has all the reasons and ability to provide a (more) complete solution. The only complaint one may have is to have ability to remove/disable the things you don't need - which you, as an experienced user, can do (eg. WSL is optional). I'm not saying this results in a healthy industry (monopolies using their monopoly to get into a much wider field) but if you see the world from an average user on one end, and a profit oriented company on the other, it's rather obvious how things happen.