My very-non-self-driving car beeps when I'm not wearing my seatbelt; clearly technology to detect the driver's presence is not rocket science. Lawyers saying it

My very-non-self-driving car beeps when I'm not wearing my seatbelt; clearly technology to detect the driver's presence is not rocket science. Lawyers saying it's the "driver's responsibility" strike me as a fairly weak argument, if a Tesla is at all allowed to autonomously accelerate without a person physically putting their butt on the driver seat in the first place. </two-cents>