Well yes, it's undoubtedly a shift in mindset that's required, just like fiat ---> crypto.
Deletability is another is issue. While "expected user behavior" for legacy social media is that posts can be deleted (even if that's kind of a meaningless "Kabuki" because of screenshots etc), that functionality is very limited on Nostr.
In a similar way, people expect that their banks can reverse transactions, which is by default impossible with crypto.
That metaphor doesn't really work. crypto is literally the most immutable, permanent record in history.
Nostr's lack of data integrity isn't a "mindset shift" required for sovereignty. it's just a specific architectural choice to prioritize relay simplicity over consistency. You can have decentralized self-custody and reliable history (like Git, SSB, AT Protocol etc.) - Nostr just chose not to.
You're right, it is a practical protocol choice... One that I think does have arguable impacts on decentralization.
This is similar to the "blocksize wars". The argument for decentralization was that, if you increase the block sizes too much, it will be too costly in terms of computation to run a full node.
There's something similar there in comparing (say) SSB or ATProto to Nostr. The former systems require you to update the entire state of the system, and keep it live-updated, to be able to participate in the network. This, in my understanding, is a big reason why ATProto isn't more decentralized.
As for the experience of legacy social, say X users, as I've argued both the "permanence" and "deletability" of posts on those platforms are sort of illusions. Do X users really trust that some tweet they made 5 years ago is still on the platform? Conversely, does Kanye really think that when he deleted all his tweets, nobody's archived or backed them up? Of course not....
This assumes everyone is Kanye. The vast majority of people who do delete a post on X, their posts were never screenshotted, often never even read. Perhaps they just felt embarrassed after a few minutes of cooling down, or noticed a grammar error, or wanted to rephrase things. And even for posts that have been up for a while, often it's just them tidying up, and again, nobody will have cared to screenshot those posts before they deleted them.
