They demand that there is a form and that there is a structure with which to proceed - a set of instructions a rule-set and that the degree to which they are able to adhere is a form of morality and success - not the fact of being able to approach without that structure and to be able to infer it as one goes forward and to specify through one's action in the unknown and to find that you can come to the same place or perhaps even find a better path.
Sustainability means that you expect resources are going to become more scarce and you expect that it's going to be more difficult for you to maintain your level of power, set of capabilities, your activities, your interests, whatever it is that you want from your life - that you're not going to be able to pursue and achieve it.
So, the best thing to do, is to consolidate power in the world in such a way that preserves your way to do that. You call this sustainability and you find that those who think like you and who deserve to benefit from it, it's perfect because they're to continue with the existence of humanity and whatever that entails. But, for everybody else, who doesn't think like you - well, they're just not fully human, are they?