People are protesting because the same factors present in wrongful deaths are also present in lower-level harassment by police. Black people have lots of personal stories about police encounters which will never be widely shared because there's no video and you have to trust the storyteller that the police acted wrongly. From the article:
> A recent CCRB report focused on police abuse against Black and Latino boys: “Young teens or pre-teens of color were handcuffed, arrested, or held at gunpoint while participating in age-appropriate activities such as running, playing with friends, high-fiving, sitting on a stoop, or carrying a backpack.”
The report doesn't focus on police shootings, it focuses on police abuse. Protestors are using uncommon events to highlight common events.