The fact is, I need God to help me love God. And if I need His help to love Him, a perfect being, I definitely need His help to love other, fault-filled humans.
People can leave seasteads, or people can choose them, and people can create new seasteads if they want. This fluidity will engage an evolutionary market process that'll allow a diversity of societies to emerge that will in principle be superior, simply because people chose them. Governments on land don't allow this fluid dynamic of choice.