It's also doing a lot of good. It's in the nature of any broadcasting and communications platform
Better analogy augmenting yours: just cars. Accidents between cars or cars and pedestrians kill lots of people every year.
This works with every tech. Phones have made it easier to coordinate crimes. Printing press and even televisions made mass propaganda possible. There are always tradeoffs.
Facebook has done a lot of harm to the world, but it also has done plenty of good.
Aside from that, your analogy is incredibly weird. Do people drive drunk to... work? Who does that?