Hmm, I notice that melanoma wasn't addressed in this study; maybe "having a good look at suspicious moles just in case" doesn't count as screening, but early detection of melanoma is considered pretty important for survival.
For a rare disease, I have already met too many people who have/had it. Lifetime risk is about 1:100 for white Europeans, not exactly commonplace, but not that rare either. I definitely don't ignore anything that happens on my skin, that would be a stupid way to die.