Headstart populates a new site with dummy content, to help the user visualize the theme's possibilities. If, however, a user just wants to start from scratch, they have to manually remove all of that content themselves.
Headstart already has functionality that would allow various UIs for this (there's already a "make your site look like the theme" section live on wpcalypso.wordpress.com that uses Headstart). These were tools planned by the Gravity team that were never able to be realized after team re-allocation.
Headstart populates a new site with dummy content, to help the user visualize the theme's possibilities. If, however, a user just wants to start from scratch, they have to manually remove all of that content themselves.
Headstart already has functionality that would allow various UIs for this (there's already a "make your site look like the theme" section live on
wpcalypso.wordpress.com
that uses Headstart). These were tools planned by the Gravity team that were never able to be realized after team re-allocation.