>The sun is not "generally recognised as dangerous"
You don't live in Australia.
Sunlight is very much recognised as dangerous. Children are not allowed onto the playgrounds at school without large brimmed hats. For outside swimming and the like, the general practise is sunscreen, hat, and uv-protective long-sleeved shirts. Sunglasses are also strongly recommended as sunscreen around the eyes isn't fun.
1 in 3 people here will get skin cancer.
Even growing up in the UK, I was taught to leave the bed-covers turned down for a while to allow sunlight onto the sheets.
And I do believe there are also companies looking at piping uv light into people's respiratory systems to disinfect them. Whether it works or not I don't know, but I don't think your understanding of what Trump was suggesting is accurate. I don't know if you would prefer to be ignorant or wilfully misleading. Either way, you don't help your cause by misrepresenting people you don't like. If it worked, I'd certainly prefer to have a light-based treatment than take a stack-load of antibiotics or retro-virals.