Surgeon's hands...
If you've ever watched a surgeon wash his hands, it a long and extremely thorough procedure. They have special soaps and brushes and they get their hands squeaky clean. On top of that, they don sterile gloves so even if there are bacteria left on their hands (likely, at least some) the gloves will block them. In the operating room they keep a sterile field and if there is any breach of the field they go through all sorts of routines to re-establish it.
That said, for most healthy people 160F is hot enough, coupled with modern detergents, to get clothes clean, white, and "sanitary". Bearing in mind that the only really sanitary condition is achieved by subjecting the fabric to moist heat in a pressure cooker (autoclave). Even then, there are some organisms (like raccoon worm eggs) that can survive even that (they need to be flamed to kill them), and quasi-organisms like prion proteins (which can cause mad cow disease) that also require flame treatment for complete inactivation.
There is also a growing body of medical thought that too-clean conditions when a child is raised has resulted in an increase in problems like allergies. There's also a school of thought that the lack of intestinal parasites in the modern western world has led to other problems like irritable bowel syndrome and Crohn's disease.
I have a Miele that can do boil washes. I don't use it at that temp very much if at all, because it's extremely hard on fabrics. I would call it the diaper setting.
