Shaka444 Preferences are supposed to change default settings.
One of BeOS paradigm was to have sensible default settings to avoid users to always and first change multiple settings.
Haiku took on that legacy.
DriveSetup app is not about settings, because there is no default "settings" about disk(s) partionning and file systems. Plus, such modifications are most of the time not reversible.
Hence why Haiku devs decided long time ago to no place DriveSetup app as a preflet app.
Hopefuly, it's also an app user should not have to use frequently.