Why can't TeXShop replace FrameMaker or even Word for medium to long documents?
Okay, this is a really odd question.
TeXShop (like all TeX based editors I know of) is hand coded layout. You can't tell me you learned TeX coding in a matter of minutes (or even hours). Word, AppleWorks, FrameMaker, QuarkXPress, Create and InDesign are all WYSIWYG layout tools for document creation. Even TextEdit works better than any TeX based editors for writing for most everyone.
NO code based document layout program is ever going to match any WYSIWYG program for the general public. That is like asking people to go back to running their computers via command line (definitely not the
Mac way of doing things).
I'm in mathematics, so I use TeX (I happen to like iTeXMac). I provide service for a number of local magazines so I'm very proficient with QuarkXPress and InDesign (though I use Create on my systems). I do some web design and I use a combination of WYSIWYG web tools (Create, GoLive and ImageReady) while still hand tweaking the source code in OmniWeb.
What I'm saying is that it is great that you have
discovered the power of TeX, but it is as far from being a universal replacement for Word and FrameMaker as you can get. Until the average person can walk up and start using a TeX based editor as quickly and easily as they can with a WYSIWYG application, it'll never have mass appeal.
What I find curious is that what seems like a very obvious concept has alluded you.
You aren't
really asking "why" here... are you?
On the other hand, Publicon does look promising... but considering the pricing of Wolfram's other products... I'll stick to my current methods of document creation (and most likely wouldn't recommend it as a replacement for FrameMaker or Word unless TeX out put is needed).