So is one's location while in public. It doesn't mean I want someone tracking my location every time I leave the house. The aggregation of public data can end up being an invasion of perceived privacy.
Nonetheless, follows have always been public information on Twitter and Bluesky.
A lot of what drives feed algorithms are interactions rather than just follows.
I imagine it’s one reason why X/Twitter made likes private as they want people to like things for the algorithm but not be judged for their likes.