And what is the point of keeping the blockchain so decentralized it is not even useful for no one? Who will run a node of a useless blockchain? If most transactions are driven off chain, will transaction fees will be enough to ensure strong enough security? I seriously doubt it.
Here is your answer; please note your questions indulge in the fallacy of
petitio principii.
The true value that Bitcoin brings to the table is not "everyone gets to write into the holy ledger", it is instead "everyone gets to benefit from sane and non-inflationary financial instutions whose sanity and honesty are ensured by the holy blockchain".
-davout
It doesn't address my questions at ALL.