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The 'follow' label is not perfect but good enough, I view it as us having voluntary free subscriptions to a variety of feeds, from friends and acquaintances to both known and random strangers.
And the things we post are the tip of the iceberg of what we have on our mind. While we post a serious text we can have a good mood and a goofy humor at the same time. We can sense it when we know a person even if it is not visible.
Nostr is a completely mixed bag of cool, honest stuff and communication.