I get it; if you are pro you usually have to learn whatever software gets you where you want to go; if you are just a casual user, you can afford the luxury of falling in love with a certain platform and getting accustomed to certain software there. For those users if something on their platform changes to their dislike and the company is not willing to appease them, then well, tough luck I guess...
Most people aren't asking "does $OS run an image editor?" they are asking "does Photoshop run on $OS?". Replace Photoshop with any widely known or niche application (as both are reasons to select an OS).