Diversity of decision makers in a centralized system is not a relevant step towards the equality. It implies indirect limited representation of the specific groups of people by the decision makers who come from those groups of people. However it offers no guarantee that knowledge, wisdom, and decisions of the members of those groups will be included in the centralized power decision process.
Representation as a system of collective decision making is using diversity to extend its centralized distribution of power. Representation, diversity, and openness are many cases placed in conflict because representation and diversity can maintain centralization as is, while openness changes it.