5W @ 450nm wavelength can do the same things as 40W @ 10600nm. For example, on organic materials like plywood, the 450nm is way more efficient.

Most laser cutters use CO2 tube lasers because you can easily scale the output power by just adding length to the tube. But they are emitting 10600nm which is not ideal for the material processing. CO2 laser cutters compensate it with powers of 40W+, but in the end, only a fraction of this energy is really absorbed by the material. 450nm is absorbed almost to 100% on organic stuff.