3. No need for further inspection
Corollary to the point that it has been designed and tested using computer applications, it eliminates further inspection before using the product. One does not need to worry about broken circuits and has a bigger chance of it working than boards that the manually created bread board.
4. Inexpensive to mass produced
Creation of multiple circuit boards from one design is easy to do since it only needs to print the design and etch it in a copper board. It makes mass production cheaper than manually created boards. One can save the schematic design and can reproduce it anytime that the board is needed.