Nobody likes that these protests are likely to lead to increased transmission. It's a truly terrible choice. People are making that choice because these protests get to such a fundamental problem in our society that they are
still worth it, despite the cost. And, as has been mentioned, mask usage is high, and these protests are outside. It doesn't eliminate the risk, but many, many people are still trying to minimize the public health risk.
So, yes, context matters. I would absolutely argue the value in the being part of the strongest push against police brutality in decades, that just might result in systemic change, is incredibly more worthy than virtually any other activity. It does not mean there is no public health cost. It does mean it is a tragic choice to have to make.