The explanation is most likely incorrect though. A more obvious cause of this error is that the current working is the root directory (/) and that they’re logged in as a non-root user, thus trying to create the file /woman without sufficient permissions.
Technically he is also wrong about what touch does. The purpose of touch is to update the timestamp of a file and only if the file doesn't exist, the file gets created.
I would have guessed you don't have permissions on the directory to create
the file.
Btw, sudo is fine for server administration but imo too big and troublesome for desktop use. There are tools with fewer than 150 lines of code doing what you use sudo for on desktop.