There's a question to ask here I think about where you draw the line with everything. With regards to the truck stuff and how prominent that has been in the news in recent years, down the line this could be used to justify the view that the only cars that should exist should be driverless. For example:
https://www.inverse.com/article/38003-driverless-cars-answer-truck-attacks
https://www.express.co.uk/life-styl...-self-driving-petrol-diesel-ban-electric-2025
And this quote has been attributed to Merkel:
So the discussion is already there, and it would again be this chipping away of liberty in the name of safety, because if a time like that ever comes, you could only go where your car is able to take you, which is probably going to be determined more and more by a select few companies as time passes.
With regards to other things that could hurt other people, you also have alcohol, which is clearly a massive contributor to violence, death and abuse all around the world. It's the same situation in that you have people who feel they gain something positive out of it (social benefits, relaxation, etc), just as people may feel with owning a gun (safety and recreational enjoyment), and in both situations you have industry leaders that would presumably be vehemently opposed to any prohibition. And again, as you say:
Back to that point again.
Control of one thing as a single act may seem quite harmless on its own, but it's worth thinking about what sort of monstrosity of a society in terms of legislation and prohibition we could be heading towards because of this sort of incrementalism.