Here's a quote from Mitchell P. Krawiec-Thayer, PhD, since you don't appear to understand what's going on here:
The term “decentralized consensus” refers to a set of principles and techniques that allow participants on a distributed network to arrive at perfect agreement on a shared document or database. Systems built upon decentralized consensus methods are inherently tamper-proof, censorship-resistant, and permissionless.
I'm not aware of any tech that can do this quite as well as blockchain. Developers are certainly leveraging these features.
Right now on Ethereum there are 885,126 validators. It's going to be difficult and prohibitively expensive for any one group to influence consensus. How about some facts instead of rhetoric.