True, they'd have to learn how to use arguments with spaces in the shell -- but this won't necessarily happen near the time they add mcd to their .bashrc, which

True, they'd have to learn how to use arguments with spaces in the shell -- but this won't necessarily happen near the time they add mcd to their .bashrc, which may lead to frustration with customization, and stifle the desire to learn. Something to be avoided when it is simple and easy to do so.