I find it interesting that OP says public crypto failed because of both fundamental misunderstandings and immature tech (internet trying to compete with newspapers in the 80s). Eventually, the internet was able to compete with newspapers and I think eventually public blockchain will compete with centralized companies.
Networks can benefit from economies of scale without the rent seeking bottlenecks of centralized agents. I agree with op that in some cases centralization naturally happens but it doesn't follow that this is true in all cases.
On a diff note, has anyone read the Master Switch that OP recommended? Worth reading?