[Dewie]

On the other hand, it can be said to be premature for the kind of people who specifically seek out the sun, trying to get a deep and even tan, spend a lot of time sunbathing to that end, etc.

Maybe I shouldn't have said "premature". We don't really know what is more healthy, whether it is how people normally do things or whether they should take care to do something else. We've done some things historically, perhaps due to adaption or necessity, but that is just a testament to the fact that it works, not that the practice is healthy or optimal. So I'm not immediately sold on what is average or normal.