Can someone please explain why a PAXOS[1] solution isn't sufficient and a blockchain is required when all the infrastructure and software is owned and controlle

Can someone please explain why a PAXOS[1] solution isn't sufficient and a blockchain is required when all the infrastructure and software is owned and controlled by a single company? [1] https://en.wikipedia.org/wiki/Paxos_(computer_science) https://en.wikipedia.org/wiki/Paxos_(computer_science)