At least according to the article, there seems to be some evidence that shorter wavelength UV can’t penetrate deep enough to cause those issues. It gets absorbed by the outer dead skin layer and liquid layer around your eyes.

From what they’re saying, it sounds like the biggest issue now is that UV light creates ozone and smog, which are obviously toxic. And that doesn’t seem to have an obvious solution, in the article they’re basically discussing how much smog is an acceptable trade off

uvc doesn't give you cancer, it can't penetrate deep enough, and the type of DNA damage it causes immediately kills the cell so it can't reproduce, cancer is cells that reproduce and don't die.

https://en.m.wikipedia.org/wiki/Ultraviolet_germicidal_irradiation