Also, if command line is a barrier for an aspiring (web) programmer, he/she should start looking for a new career path.
2. Is it unthinkable that a person could start learning web dev and pick up the command line along the way? I started out learning PHP/MySQL on my old Windows machine, terrified of the CLI, and now I do almost everything on it (and have converted my old PC to Linux). If the command line were a barrier at all points in the learning trajectory, then you might have a point. But I also don't think that command line mastery should be held up as a sine qua non of learning web dev.
2. You don't have to be a command line expert to start using it. All the books at http://learncodethehardway.org/ show that command line can be integrated in the language learning process seamlessly. No reason to be terrified of it, on the contrary, new coders should embrace it as soon as possible.