"the core professional users of Apple products" depend on the obviously consumer level products in the iWork set of applications."
Sorry, Barry. They do not (completely) depend on all consumer level products. I can do without Pages. For good text stuff, I use InDesign, and as long as Adobe supported Macs, I used Framemaker. For normal stuff, I use MS Word. But for presentations, I like Keynote. Not just that. With keynote, one can develop video clips for which you would need lots of plug-ins for FCP. And Numbers is much easier to use for people who are not experts in Excel. And Numbers charts look much better. Numbers is not a full equivalent for Excel for big businesses. However, how many people work in big businesses?
When Adobe Premiere and Final Cut Pro were expensive, even in professional areas, iMovie was used for creating smaller clips. Thus, one would pay only one copy of the Adobe software and most people would work with iMovie.
Whatever the issue is, it has been created by a release of iWork. I assume, deleting it would need not much more than a pair of clicks and one or two lines of code.