This sort of comes back to something I was discussing elsewhere about installing whole site templates that contain plugins, components, modules, content, templates, forms, whatever.
So, when you start the Joomla install wizard you can choose:
Install clean developer version - 1 framework template ready to have stuff filled in, main css classes for Joomla framework plus good starter typography classes, though all blank, nothing else.
Install Starter Version - Much as is now with one or two usable basic templates, ready to go
Install Tutorial Version - As now with sample content and perhaps useful stuff in the back end to get you going. Heavily commented template, list of main CSS classes, walk throughs - anything that helps and is current to the version
Download and install Template Package - This one would be a third party developed template package with additional plugins and so on. Maybe free, maybe bought, but it is intentionally designed to be installed during the Joomla Installation process. Choosing this option would take you to an upload form to upload the package.
The point is, I suppose, it is better to create a system where a person can choose the flavour of Joomla they want to install, rather than run in circles trying to second guess thousands of different users.