Not a silly assumption. I also think there is a preference.

But nostr itself is not compromising your privacy. You just generate a keypair and are anonymous on nostr. Linking that account to SN does not mean that you are suddenly no longer anonymous.

However, you can argue that you have less privacy now since more information about you is exposed. So maybe that's where you are coming from? But it's still a choice.

So I don't get why you are against it. This makes it more accessible for nostr users who don't care about linking nostr and SN. They are still anonymous afterwards, anyway.