Not always better. In his video about stamping, his host illustrates the difference between a one piece stamping die from China compared to the ones made in house. Basically when the single piece one starts to wear out, you have to replace the whole thing. However; with the ones designed and manufactured in house, all of the wear surfaces are replaceable.

So the CNC option may be faster and cheaper up front, but in the long run investing in the tooling to last long-term is more cost effective.