Why ensuring equal rights and opportunities for all citizens cannot be a simple matter for any government?

To try and ensure equal rights and opportunities for all citizens cannot be a simple matter for any government:

Different groups of people may have different needs and problems and the rights of one group may conflict with the rights of another. Equal rights for citizens need not mean that uniform policies have to be applied to all people since different groups of people may have different needs. If the purpose is not just to make policies which would apply in the same way to all people, but to make people more equal, the different needs and claims of people would have to be taken into account when framing policies.