And by blockchain I mean the software architecture outlined in the original Bitcoin whitepaper, and the technology that thousands of other cryptocurrencies are based on. It is a technology designed to achieve effective governance of a data source (in this case, a ledger) through a popular vote of participants in a network instead a single entity that can be subjected to a government subpoena.
Let me clarify once again, do you dispute the description of blockchain technology that is given on
Wikipedia or that as an example Gary Gensler voiced in his
lectures for MIT ? This technology can used to create a private rather and a public blockchain, and it does not cease to be a blockchain. Because now your thesis sounds something like "a wheel is only a wheel when used in a horse cart, because it was invented for this purpose", and if it is used for a car, it is no longer a "real wheel".