Why we tend to use cambered aerofoil?

We may compare Symmetrical (Non-cambered) to Non-symmetrical (Cambered) aerofoil in terms of several aspects:

1. Nose-down pitching moment in different AoA
2. Lift coefficient (CL) max (CLmax) and Speed to achieve CLmax (CLmax speed)
3. Lift magnitude in case same  AoA