To be completely fair, feed algorithms can be somewhat opaque. On the other hand, most of the feeds I follow are just picking up on keywords/emojis or include all posts from a specific list of people. So it depends to some degree on your choices.
I can't speak to any secret motivations but it seems like the folks running it care about making a nice place for people to hang out. We've seen how a desire to not be evil can clash with a desire to make money, but I remain optimistic.
This is actually what I didn't like about bsky. I don't want the developer of software to inject their personal social biases into the platform, and thought one of the main points of decentralization was to mitigate this.