That's literally not what he said in the interviews. https://www.forbes.com/sites/digital-assets/2023/05/30/bitcoin-social-network-nostr-creator-fiatjaf-/

In his first interview with the press, @Fiatjaf says Twitter’s increasing propensity to ban users had frustrated him. But he was unable to switch to a competitor while retaining his followers. Inspired by Arc's idea for creating marketplaces where shop owners could move from one e-commerce platform to another, he started developing a new protocol to manage identities—at first for social networks, then for anything else.

Commerce and censorship were the building blocks behind the Nostr from the start.