That's not an argument against building something...
> which they're far from - why is a 'central authority' inherently bad?
They're not. Sometimes you want a central authority, and sometimes you don't. Both modes can be good. But previously central authorities were necessary due to the physics of DNS. Blockchain enables a new mode. Now the two modes can compete, and we can reach a new equilibrium with both, or one can win out. That's what's cool about it.
