This makes sense. I recently saw an article in the local news that said the same as the dermatology academy mentioned in the article: Any sun exposure is supposedly bad and has to be avoided. And the concept of building up tolerance was said to be nonsense, apparently any exposure is bad even when you don't burn.

What I've always done is build up my tolerance by getting tan during the spring so I can walk around without sunscreen in summer. Of course I don't go crazy with it, and I try to avoid direct sunlight in high-UV situations (e.g. walking on the shaded side of the street) but I take it when there is no option. It works fine for me, I rarely get sunburn and when I do it's minor, just a little red glow and sensitivity. Even though I have very pale skin I tan and burn very slowly, luckily. I lived in Australia a while in the early '00s while the ozone hole was still around and the same approach worked even there

I live in a country (Spain) that has lots of sun so I don't want to go out with cream every day. The only times I use it is when I'm outside for a long time and I feel I'm getting close to burning.

I get that it's totally bad what I see many Northern European tourists do: They stay indoors most of the summer and then take a 2-week holiday to the costa's where they lay in the sun for 12 hours a day. Obviously this is totally bad, even with suncreen you will get totally burned to a crisp.

In any case, I'll see. Maybe I'm wrong but in that case the damage is done already. But I don't think sun exposure can be as bad as they say.