Motorcyclists don't usually kill an entire generation of people when they T-bone a mid-sized sedan in an intersection. That's the problem.

Wearing a seatbelt or not doesn't also prevent a family getting killed, yet its strict in cars, but not on bikes? What gives?

True, but there are quite lightweight cars and heavy motorcycles.

Lower damage potential of small and light cars compared to SUVs does not seem to give them a free pass to skip the sprawling driver assistance regulations.