I don't have to justify the words spoken by another man.
Now if you're asking me do I agree with the lyric? No.
I understand very well and fully what argument you're attempting to make. and I agree with it to some extent, but as of right now - I'm more happy for the young dude being able to escape out of his situation and when I hear his lyrics of being able to do for his Mother, that shyt let's me know what's driving lil' homie to do what he does. I don't care what side of the issue you're on, if you can hate a young man doing better for his family then you seriously have a issue with yourself.
To top all of this off, myself and another user even posted photos of him with a mocha complexioned young lady which clearly would show that the lyric in question was more than likely some slick shyt to say on a track. what's even more amazing is how you display your own inner battles, so now it's not cool he has a light skinned BLACK female preference, he has to have a specific type of BLACK female.

I'm not the light bulb in the kitchen draw, but what you're doing is in essence, categorizing BLACK women into categories and your dislike for the lighter complexion of sister shows you view them less than you would a darker hue?