As someone who has taught people to crop or enhance or grayscale millions of images from the command line I think you probably do not understand where people ar

As someone who has taught people to crop or enhance or grayscale millions of images from the command line I think you probably do not understand where people are coming from. There are no GUI people and command line people. There are people that know how to use the command line, which takes effort before it gives results, or you can use the GUI with instant gratification. Most people follow the easy path, as they should. But for garyscaling the easier path is the command line and it is very easy to sell it when they face a problem like this. If you understand this, you can make the learning transition easier and almost effortless. People are not stupid, I have taught people using vim. They saw me doing it and thought I was crazy, I made them do it after a great Steve Jobs like reality distortion field and I converted them, now they only use vim.