So you predicted botnets in 1995 and ..... nothing much happened. botnets suck but there wasn't some world crashing event like the person above is predicting for computer controlled cars. All Windows computers didn't shut off on one day.
I could see arguing with the inevitability of the exploit -- Win95 botnets seemed much more inevitable to me than this Tesla mothership threat does. But it seems like you're arguing that they will both have similar impact if exploited. That doesn't make sense to me, because they're completely different threats, but it's possible I'm misunderstanding your argument in some way.
Imagine even 0.1% cars being controlled, the mayhem and loss of life that they can cause is just immense.
Power plants are also dangerous targets in a similar sense, but hopefully there is network separation for control services.