but how is that guaranteed? If there's a single source of data, its a bigger target for bad actors, and a single source still needs an owner of some sort that

but how is that guaranteed? If there's a single source of data, its a bigger target for bad actors, and a single source still needs an owner of some sort that you have to trust isn't going to cheat or change the rules in the future. With decentralized, you still have the same issues (I don't really know how you solve those unless data transfer is truly peer-to-peer which I think causes discoverability and similar issues to usability), but at least the scope of them is inherently limited and you can opt in/out of the source based on your trust of it.