Well, you just don’t know. In the real world there are private blockchains between equipotent participants that don’t rely on burning the planet to function. Helpful reading: https://www.geeksforgeeks.org/ethical-hacking/private-blockchain/

Blockchain is a concept, can’t be owned or affected.

Anything where a trustless system is important. The “largest users can rewrite history at will” is a critique to specific implementations, not Blockchain.