I don't know Chicago, but I do know what's happened in San Francisco over the last 20 years. It's taken a long time, but the city is finally starting to take protected bike lanes seriously, sadly much of that is in response to lives lost.
When I first got here, it was just a fight for standard bike lanes. For either to happen, more people need to get on their bikes and ride. Contributing to your local bike coalition is also great way to help push these issues forward.
If everyone follows your advice and chooses to not ride because of the danger, then nothing will change, and the lives lost to poor road infrastructure and poor driver education will have been for nothing.