People don’t want to use operating systems, they want to use applications to solve their problems. Linux has always been bad at software distribution for commercial applications. It all starts with dependency hell, no real standards, a million different packs systems and so on. It simply makes Linux a pain in the butt to develop desktop applications for. Much of the user base is also very hostile towards anything not FOSS and free of charge. Desktop Linux is also fractured into different WMs and DEs, adding more pain. You really don’t want to provide commercial support for that.