Automotive Industry

What does that have to do with the drivetrain of the car? That would be due to things like better hood and road design, better enforcement of speed limits, and since you cited a stat that includes drivers as well pedestrians over forty years the move to requing roll over protection, expansion of airbag systems, more available crash modeling, and of course the near worldwide mandate that cars include seatbelts.

Most of this is either structural and thusly uneffected by a drive train conversion, or governmental.

The biggest dangers involved with a drivetrain conversion are going to be the same as any major home automotive work, namely something heavy fall or slips during work, followed by getting fingers/hair/clothing caught in moving parts, etc…

None of this is going to endanger the public, at least not to the extent that it can compete with the chance of getting distracted driving and plowing through a pedestrian or right hooking a cyclist.