There’s also nothing inherently wrong with carrying sensors in your pocket. The “wrong” is in the providers/manufacturers exploiting the position they put themselves in. Managing data is hard, and most people don’t want to do the necessary work most of the time, so the providers/manufacturers offer to do that for their users/customers. However, they also exploit their csretaker position by tresting the data like they own it too, and extracting profit.
If the solutions to the Flock problems could be framed such that other providers/manufacturers had to build systems that were “local first” or “private by default” (as in pre-internet home computing plus explicit, finegrained shsring consents), then it would also be fine to carry sensors. I want my fitness tracker and GPS. I just don’t want the data it generates used to build advertising profiles on me such that ads (and government mass surveillance dragnets) can follow my every other move.