For sure, but that leads to much more individualised advice of the form “If you’re fine to be exposed to sun for up to 2h with SPF 50, you should not expose yourself for much more than 1h with SPF 30”. The quoted section makes it seem like “You’re fine as long as you wear SPF 50+ sunscreen, but SPF 45 just won’t cut it.”, which doesn’t generalise for most individuals and their level of sunlight exposure.
For sure, but that leads to much more individualised advice of the form “If you’re fine to be exposed to sun for up to 2h with SPF 50, you should not expose yourself for much more than 1h with SPF 30”. The quoted section makes it seem like “You’re fine as long as you wear SPF 50+ sunscreen, but SPF 45 just won’t cut it.”, which doesn’t generalise for most individuals and their level of sunlight exposure.