In schools students learn "Word" and not "a word processor". I've seen high schools getting software licences with special deals (way cheaper), and thanks to that other solutions are discouraged (ie. "Word" is the standard and it will be required by any future job offer)
Can all students afford a Word licence? (ie. practice at home) It really doesn't matter, piracy it's OK because it is an investment. Companies are the final target (won't run pirated software and all candidates are trained to use that software).
You can find that kind of strategy also in open source (ie. Red Hat benefits from CentOS).