I think you're very correct. The allocation of Steem Power is the true definition of decentralization. It gives all steem owners a level of control over the allocation of steem to other members of the community.
Also, the fact that we can acquire Steem by working hard on this platform makes it a form of payment even in the smallest form. Just like paper money can be made by working, Steem can also be acquired by working on this website. From the eyes of a newbie, this is how I understand and argue that Steem is actually the true number one cryptocurrency.