The system partition is simply the factory image, nothing more nothing less. It doesn't inherently mean privileged, either. There's 2 different app locations in

The system partition is simply the factory image, nothing more nothing less. It doesn't inherently mean privileged, either. There's 2 different app locations in the system partition, 1 for real system apps with system privileges (/system/priv-app) and one for just preinstalled stuff with the same privileges you'd get from installing from the play store (/system/app)