I get your point completely. But when talking about Hyrule, Princess Zelda herself, and the Triforce, those two games generally can be considered spinoff games. I may have not been clear on what I consider a spinoff game. And really, I guess you could sort of consider PH a mainstream game...
I've personally never played FSA, never beat FS, but I always thought that FS was just a way to make the sell of ALttP on GBA better. Make it more fun, if you will. After all, it was really only playable when you were linked with someone. That dosent make it a very accessible game. The main...