THE QUESTIONS:
WHY the approval is needed?
It is necessary for public health that some drugs and complex medical devices should be proven secure before company can put them in market.
If this is not taken care of then it may happen that the use of tobacco or drugs may increase and it would be threat to the civics.Food additives are also needed to get approved before using them in food.
Medical devices such as X-RAY machines or Microwave ovens must measure up to standard performance.
Plethora of things are kept in check before reaching in hands of public.