There's nothing wrong in principal with the idea of a system that recommends items from strangers. Indeed, that's a great way to find people to follow! But "stuff we think you'll like" is not the same category as "stuff you've asked to see."
Why do companies balk at showing you what you've asked to be shown? Sometimes it's because they're trying to be helpful. Maybe their research, or the inferences from their user surveillance, suggests that you actually prefer it that way.
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But there's another side to this: a feed composed of things from people is *fungible*. Theoretically, you could uproot that feed from one platform and settle it in another one - if everyone you follow on Twitter set up an account on Mastodon, you could use a tool like #Movetodon to refollow them there and get the same feed:
https://www.movetodon.org/
A feed that is controlled by a company using secret algorithms is much harder for a rival to replicate.
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