Voting gives people a voice? Then why do we have political protests? Is that for people want an extra voice?I'd say it has, a voice is important in addressing your grievances, you may disagree.
The fact is that voting rights are symbolic for minorities. They get the politics of the majority, whether they vote or not. The reason voting rights are important for minorities is because IT IS WRONG for governments to treat people differently based on their race. Not because it gives them a voice.
Don't confuse suffrage (voting rights for the female majority) with voting rights for ethnic minorities.