Something not mentioned in the previous post is that there was a fourth alternative presented by the man who posed the experiment to his followers on Twitter. If people who were participating refused to make a choice throughout the entire post, then DKnight blocks those people from his Twitter page. By not choosing, it was like consigning him to obscurity in the same way as untold stories of police brutality have occurred to people of color without the benefit of someone recording them. To literally let him go because he'd block you and you would experience the actual loss of him.
How many Arberys, Taylors, or Floyds are there who haven't had their stories told? Who was there to mourn these people? What was done to ensure their killers were brought to justice? And worst of all, who could be next?
The Black Lives Matter movement exists to answer that question by saying "no one, not one more."