COVID-19 Outbreak (Update: More than 2.9M cases and 132,313 deaths in US)

Are they saying that people that are not sick need to be tested? If so what is the purpose of this? I have no desire to be tested if I am not sick.
What about asymptomatic carriers? They are the most important people to identify. An asymptomatic carrier unknowingly infecting many people, can cause a superspreader situation that would be difficult to trace.