I personally make all my knives.
I do not put handles on water jetted blades that others have cutout, ground and heat treated.
I hammer forge many of my knives.
Damascus blades are cut to shape from damascus stock then ground and heat treated. This insures the damascus pattern is not distorted as it might be if forging the blade to shape.
Some blades with a pattern that does not lend itself well to forging to shape are also cut out from high carbon steel and ground to finished shape before heat treating.