The problem would be naming this abstraction after somebody specific when there's nothing about it to tell or even suggest to an observer that it's supposed to be somebody specific and there's nothing about that specific person to point from him to this kind of imagery.
But, of course, that wasn't the intention so judging it by how well it did at that is pointless. What the artist was actually trying to do was recreate what (s)he apparently thought of as an iconic photograph which I don't recall having ever seen before:
https://media-cldnry.s-nbcnews.com/...tin-luther-king-jr-coretta-ew-140p-7b61e4.jpg
The fact that they're awkwardly side-hugging to face the cameras instead of facing each other diminishes its impact because makes it less of an interaction between Martin & Coretta and more of a publicity pose, but it does explain why the positions in the statue are so strange. I was wondering at first why the shoulders were so narrow. They aren't narrow; they're just very angled.
It seems that the artist's main problem is that (s)he didn't realize that that photograph is not well enough known for just the arm positions alone without the heads to evoke it for the average observer.