If you are a minority and get hired, and the company has an explicit policy of hiring N% of minorities, then you will always wonder (as will all other employees) whether you were hired because of your minority status or because of your actual skills. This is very bad for morale and self worth.
I don't think the minorities themselves were consulted. Perhaps it is being instituted by a minority, but they do not represent the preferences of people they purport to help with these policies.
I think the UC university system has it right because they ban racial preferences for admitting students. While overall the percentage of certain racial minorities is lower there, those that do get in feel accomplished and deserving. This is a better outcome for society and personal self worth.