That's the only downside of rioting. Once people have had their outburst it typically changes very little and what does change only changes for a short time.
Uhhhhh its a riot. What is an upside to rioting? Free items for a poor neighborhood that gets poorer? Quicker deaths and harsher treatment by the hands of government forces who police the neighborhoods. The closure of schools?
There are other ways besides rioting to promote and create change.
Chaos is not a prerequisite for order. These people are feeding the machine, not destroying it.
Sure there's an upside to rioting. Pressure busts pipes, those people have been dealing with brutality and other issues silently for years. Eventually it will erupt, this eruption is necessary sometimes to fully express the disenchantment of those people. From time to time a little rioting can be healthy, sometimes you have to show that you really do care, there is only so much tweeting you can do.
I would prefer a more intellectual revolution, not one that involves violence and property damage but It was only a matter of time. From Trayvon to Akai Gurley to Eric Garner to Walter Scott et al. Folks have allowed these things to cloud proper judgment, but they will be heard that much is for sure.
And ultimately that's the point, when you are being ignored in an argument you get louder, and louder and then you may start slamming your hands on the table and eventually turning the damn table over. After the outburst attention is squarely on you and you will be heard and then begin to deescalate.
So It will deescalate in a few hours, maybe days and normalcy will return. Baltimore will be just fine.