I think it's a pretty safe assumption that during rush hour traffic in any metropolitan area there is going to be the need for several ambulances daily.
If someone died because the ambulance they were in couldn't get through, the world Would stop spinning and come crashing down for some people. Namely the injured person, and their families. Someone is going to lose the breadwinner, the caretaker of the children, their child, because some idiots are protecting something that isn't going to mean a hill of beans to anyone, in the long run?
Personally, and I know this is just so wrong
I think most protests that take place are a crock of ****.
Just because someone feels strongly about something does not mean that standing around, blocking traffic, waving their arms and signs, and generally being a nuisance is the best way to work toward a solution.
If I could be shown empirical proof that some black person didn't have violence inflicted on them by police directly due to this protest, I might have something to think about as far as revising my opinion.
A group of people even planning something like this would have to, by definition, be idiots.
What about all the nurses, doctors etc that couldn't get to work, and because the hospital was now short staffed, someone died? A pilot can't get to the airport, so a flight is delayed/cancelled? What business did that distrupt down the line?