The idea is that we would create the coop.
We pick the coop, the coop does not pick us. This is no different than leaving PODs where you want to in Solid, except that it eliminates the problem of applications interlinking so many data repositories and other apps, passwords and access layers all over the place, blockchains being immutable, etc.
Please tell me what is missing in this simpler solution. The TSIS Project (tsis.info) is based on it.