In otherer words, the constitution is above the law. And the constitution allows laws to be changed, in this case by the will of the majority. The same is true for all public blockchains btw.
So I'm not sure that it's really all that distinct from legislative majorities in traditional legal system (and clearly less of a genuine majority than in legislative systems where the public retains, whether or not it chooses to frequently exercise them, powers of initiative and referendum.)