A great question to expand on. True, already said something like that, but I can once again reveal it. Both the blockchain in general and Bitcoin in particular at the current stage are completely controlled by a person. Updates and hard forks are an example of decentralized human control of the system, because by the decision of the majority the system can be replaced with any other one at all, and the blockchain can not oppose this, because it is just a banal tool for solving a specific problem.