Not only redundant, but also a waste of time, since nobodies is going to be accurate.
Maybe they want you to spend a good time proof reading.
Seriously though, I never understood minimums either. If it's to prevent lazy students from writing two pages and calling it a day, then why set the guidelines? It's their decision not to do the work, they should reap what they sow.
I'm okay with loose guidelines like, "It should be around X amount of pages," as that helps you determine how much depth they're looking for, but oftentimes I'll find that I've written volumes on a subject in 6 pages when they demand 8, and I'll still get an A on those papers after I fluff it up.