The perspectives and tools presented allow for the development of sophisticated and robust solutions to sustainability challenges. They may require more effort and care to develop but the goal of sustainability is arguably worth the effort.
These solutions can be reflected in policy development. Such policies would be realistic and robust.
One last caveat: remember that for every action there is a reaction. Those reactions should always be considered. If you enact a policy, it will inevitably have social costs that may have to be paid for later.