Sunlight can definitely clear up some skin conditions like eczema. I don't know about making skin healthier in general though. It 100% causes aging in skin though so any "healthier" skin you get will be totally wiped out by the wrinkly mess it becomes in your 40s.

The message we should send kids is not "wear suncream; it prevents cancer" it's "wear suncream; it prevents wrinkles". Surprising how many people don't even know that.

There's a famous photo that demonstrates it very obviously:

https://metro.co.uk/2018/01/28/photo-truck-driver-shows-28-y...

Which side would you prefer?