If we live long enough to reproduce and usually impart some guidance to offspring evolution has done the optimization it will do. You seem to want to believe in a lot of systems that may sort of work but really we are not right to expect that every dose of UVR isn't a roll of the dice for a game plan that works out to less than 30 years in the sun while having hair or taking reasonable precautions for having no hair.

Trying to hide low but perpetual UVR risk for people who think they are going to be immortal is counterproductive compared to fixing the delusion that would make someone avoid life expecting to get more of it.