Current limiting method has nothing to do with the accuracy. Current limiting and accuracy are two different things. Current limiting is connected with the load circuit and is a safety like for the load circuit. If you use a simple (for understanding) 100µF capacitor as smoothing capacitor and then you use a semiconductor in circuit for current voltage control, the effect of smoothing capacitor is simply multiplied with 100 which means a 10µF capacitor will give you a 1000µF effect.