The Difference between the car and speeder is would even be little kids as well since they seem to be so easy to operate.
So is a convertible with the top down and keyless start. There's a remedy for that. You put the top up and close the windows. With the doors already locked, bingo! Little 7-year-old Mary Sue and her pet teddy bear won't be driving away with it any time soon.
There's a solution in Star Wars, too. They're called code cylinders. You know, those little pens that everybody with a vest pocket seems to have in there? You want to secure the speeder? Just rig the operating system so that it won't go unless you insert the right cylinder, or "keyed start." Once again, little Mary Sue is safe from her own impulses.
Plus I think cars are just seen as more secure than bikes of any design.
And air travel is supposed to be statistically safer than driving. That doesn't mean everybody abandons the automobile for the plane, and experienced riders don't care how much safer novices think cars are.
I don't know if it's a fact but t I got assume people survive car accidents more than bikes.
But cycle accidents are survivable, because there are helmets, pads and rugged clothing available to bikers. Again, you're assuming that it will never occur to anybody that riding a high-speed one person hovercraft might be dangerous, and that the people it occurs to won't find ways to make it safer.
As for the spaceship I think you are right but sooner or later someone would mess up and the idea that we got dead people floating in space would I think create a bad image in people's minds. Even if you take in account personal responsibility I am not sure it would sit right with people. These images of people dying of starvation or being sucked out into space and loved ones never knowing for sure would become to much I think for society.
Current society, maybe, because human spaceflight is rare, complex and expensive. Then again, so was driving at one point. And atmospheric flight. The more utilitarian an activity becomes the less affected we are by the consequences of that activity's mishaps. If NASA had failed to recover Apollo 13, the result might have been the end of American spaceflight, and we almost got that anyway after the Challenger and Columbia disasters. But what we're talking about here is Star Wars space flight (or Firefly, or the Expanse), where anybody can literally lay some duckets down for a ship and take off. In that environment, an accident in space, even a fatal one, will have about as much impact as a highway accident. You'll rubberneck if you drive past it, but if you hear about it on the news you'll go "Shame, that," and commute to work on the moon the next day in your T-16 like nothing happened.