When using emojis to convey their emotions, some people prefer their emojis to match what they look like. It's not a big deal - certainly not worth complaining about a feature that makes some people happier. The impact of online avatars on self-perception and outcomes is an interesting topic that's worth looking into (it's not limited to race).
But more importantly, why shouldn't a black person be able to use a black emoji? We have the technology.
I agree completely - why not let folks have emojis that more accurately reflect them?
That said, I agree with the GP, who the hell says "I don't approve of unnecessarily gendered emoji"? I mean, fine, then don't use them.
Or other commenters that felt uncomfortable plus-oneing emojis that didn't match their skin tone. Really?? I upvote these things all the time without a second thought because it just means I agree with you, not that we're the same shade. I think it's kind of sad when literally every mundane action, even something as trivial as upvoting someone's comment, can only be seen through the prism of race first and foremost.
But more importantly, why shouldn't a black person be able to use a black emoji? We have the technology.