I think a lot of healthcare is about doing what works for the majority. So, if you give every smoker a chest xray, you might detect something in 1 out of 1000 people. . it’s worth it for that 1, but that rate doesn’t push the system to do it, recommend it, it’s not cost-worthy, etc… So if doing skin screenings might catch something for that 1 out of 100 people or whatever, it’s worth it for them, but for the system as a whole it’s not. I hate that’s how the system works. In 2007 when my wife was pregnant, had they measured cervical length, they might have found that it was shortening and something was going to go wrong; but, they don’t do that as a matter of practice because for 99 out of 100 people, it wouldn’t show anything. For the 1, it stinks, but the system seems to do what works for the majority.