The article is referring to black-body radiation. The Sun produces very little shorter than UV. Gamma-rays are produced in the core, and are absorbed and re-emitted as longer wavelengths almost instantly. X-rays are created in magnetic field and electron interactions. Compared to the amount of black-body radiation emitted, everything else is relatively minor.
We install software on Navy ships, and a big problem we have is the ship crew is not trained how to maintain their systems. They are so reliant on someone else coming onboard to fix issues. They are so excited when we show them how to do it. Very willing to learn, just lacking training and experience.
The biggest problem was finding people who knew how to manage Linux and Libre Office. Lots of admins take MS courses, few take Linux ones. Same with the users, they come in with MS experience, and have trouble transitioning to the Linux world.