it is like saying in the 90s: we don't need open protocols like pop3/imap, because AOL is centralized anyway

(fast forward today: yes, most people still use centralized gmail/outlook.com, but I still have a) the choice to host my mails and b) lower cost to build a service that compete with the big ones, as I don't need to part of the big-players to plug-in to the open "email-system")

In "crypto" centralized" companies are not required for most stuff inside crypto (mostly necessary to bridge the new with the old fiat system)