Your unspoken implication is that if FCP were sold separately, it would be cheaper than the full Studio suite. I don’t see that happening. At this point, none of the other applications in the Studio suite could command much of a selling price, nor are they particularly useful without FCP.
Although Color was once a $25,000 application, its development has been slowed considerably at this point and it would not fare well against other standalone color grading applications (DaVinci, etc.) if it were to be sold at a similar price.
Motion does not directly compete with After Effects. It’s faster at some tasks due to its GPU utilization, but its feature set is much more limited. It’s primarily intended as a supporting application for FCP.
Soundtrack Pro is not a Pro Tools competitor, and Apple itself sells Logic Studio for more serious audio work.
DVD Studio Pro is still a great DVD spec authoring application for the money, but it doesn’t do Blu-ray authoring (and most likely never will), and it hasn’t been significantly updated in years.
Compressor is a great Swiss Army knife for compression and conversion tasks, but compared to free tools like MPEG Streamclip and more robust tools like Telestream Episode, I doubt it could survive as a standalone application on its own merits.
Also consider that FCP’s closest competitor, Avid Media Composer, retails for more than double the price of Final Cut Studio. Many people believe that Final Cut Studio is already underpriced, as its true strategic purpose is to help Apple sell more Macs, not necessarily provide the most comprehensive set of tools for professional video editing and finishing. That goal would arguably belong to Autodesk Smoke, which is priced at $15,000 for the software alone.
Many other professional postproduction applications sell for prices far above FCP, such as Nuke, Mocha Pro, or any comprehensive 3D software package. Final Cut Studio is already a bargain, even if Apple were to charge $1000 for Final Cut Pro alone.
Think of Final Cut Studio as Final Cut Pro selling for $999 with several free programs thrown in, not a suite of equally priced applications.