Does the present military have a decompression time for soldiers right from the front lines?

Why is there no decompression time for returning vets? It seems you are in the field killing people on Monday afternoon and by Tuesday evening you are stepping off the jet in Hometown USA somewhere. I spoke to some WWII vets who talked about being debriefed and decompressing on a base somewhere for at least a week before you were discharged back to civilian life. Is the military that broke that it wants to boot these young people out so quick? Can one go from efficient killing machine to factory floor or sales floor like flipping a switch? Can they just put down sleeping with one eye open and both ears at the ready and stressing over every parked car at the side of the road or every motorcycle by the food stand to complete calm? When taking some young man from shooting and being shot at near daily to any street USA how long should he be given to ”unwind, calm, and decompress”?