[motters]

I think this is a straw man, because whether the internet is centralised or decentraised doesn't depend on how knowledgeable its users are.

We have a decentralised transport system, and modern vehicles are very sophisticated, but that doesn't mean that every driver needs to be an expert mechanic or embedded systems engineer.

[iamcurious]

Most people understand the basics of car security much more than they understand the basics of computer security. It is much easier to see that losing control of your car is dangerous. It is much easier to recognize when you are losing control of the car. There is a tangible sense of being in power of their own vehicle that is really hard to convey with something as abstract as a general purpose computer network.

Even so, as cars gets more complicated there is a tendency for centralization. There are more laws and regulations, there is a bigger dependency on the company that designed it, some cars even update their firmware remotely, and so on.