How Do Devices Provide Haptic Feedback?

At SAIC, on a project that produced two full VR scale race car prototypes, part of my responsibilities was motion control and managing the steering wheel.

I had taken a three day racing class taught at Laguna Seca and one of the experiences with a real race car is the feedback on the steering wheel: chattering when one tire goes of the track to the warning string, the smoothness when a car goes into a spin, and increased tension on turns. I had full control over the steering wheel because in addition to it being an input device, it also had a precision servo motor that I could control to get these effects. Awesome experience, if I do say so myself.

More importantly, why do Android devices insist on providing haptic feedback by default? It annoys the crap out of me. It's the first thing I disable when I get new Android.

all of these features are available already in the programmable haptics of pavlok (http://buy.pavlok.com)

The feature being haptic feedback? Or strong redundancy using 4 different technologies for the same job? Why does a bluetooth enabled joybuzzer even need 4 different kinds of haptic feedback?