[saghm]

You seem to be missing what part of that implies "spending time in the sun with sunscreen is risky". Wearing sunscreen doesn't magically make you not exposed at all to the sun. I also think you're assuming it's easy to calibrate your exposure to gradually ramp it up, when I suspect it would probably vary quite a bit by person; some people burn extremely quickly in the sun. Some people who are relatively pale will often need to apply sunscreen hourly to avoid burning.