I'm afraid the problems with ML are less like "whoops. we don't have seatbelts" and more "surely internal combustion engines optimized for power and mass production couldn't cause problems. It's not like there are going to be millions of them crammed together in lines 3 or 4 across crawling around at 10mph every day. Plus, fossil fuels are cheap, plentiful, and really have no downside we know of. Way better than coal at least - much less awful black smoke!"