The PHRASE "black lives matter" is true and good. The ORGANIZATION and most of the ideas behind it are BAD and counterproductive.
Among other far-left ideas, the BLM organization promotes the "destruction of the nuclear family" - which would worsen one of the ROOT CAUSES of problems in black-majority communities. It also promotes on its DC chapter's page the complete abolition of law enforcement.
https://blacklivesmatter.com/what-we-believe/
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3904543/
http://fathers.com/statistics-and-research/the-consequences-of-fatherlessness/
https://thefathercode.com/the-9-devastating-effects-of-the-absent-father/
https://www.lifesitenews.com/blogs/why-christians-cannot-support-black-lives-matters
https://capitalresearch.org/article/blm-roots/
And "systemic racism" is a poorly-defined term, but when often defined as "the police being full of racists", it's completely contrary to what the statistics show.
https://www.pnas.org/content/116/32/15877
https://youtu.be/-NqG6x9yF_o?t=214
https://www.facebook.com/terrencekwilliams/videos/291664548522788/
https://www.youtube.com/watch?v=piwaBO6U43U
https://www.youtube.com/watch?v=uk0Y6woydjk
https://www.youtube.com/watch?v=1sV5qU6e-YY
https://www.youtube.com/watch?v=iOLUEk9cozY
https://www.youtube.com/watch?v=YdWuaK9jin8
I'll be avoiding shopping at Walgreen's from now on.
Yet apparently they can afford to have half their customer base choose not to shop there anymore.