Saying “all lives matter” comes with consequences. You’ll be told that saying the words is an act of ignorance, shallowness, and possibly even racism.
Rachel Cargle wrote a piece for Bazaar in 2019 that kind of summed up the argument against saying “all lives matter” in a single paragraph:
But as the Black Lives Matter movement emerged, they were all of a sudden jolted into an awareness of the intersection of race and surviving police encounters. Instead of exploring the reasons why a movement like this would even be necessary, many have a knee jerk reaction. “What about me?” “All lives matter,” they cry. “Why be divisive and unfair, what about our safety?” The point these people miss is that the majority of experiences here in America already tend to center and highlight whiteness and cater to its safety. The country was built to function that way. Its roots of white supremacy and the marginalized concern for people of color has remained.