Why is Linux desktop not popular among non-programmers?

[Ralf Mardorf]

PS: Somewhat abstract examples: There are so many areas, and for some
areas developers have to write software that depends on expensive
licenses, if the licenses are sold to open source communities at all. Or
very specialized hardware is needed, in such cases the hardware
manufacturers must first be willing to provide drivers themselves or
release the necessary information so that a community can provide
drivers without reverse engineering. It's rarely about the desktop, the
user eats what he has to if the necessary applications are available and
ideally also work well.