You don't seem to understand the organizational power of subclips then. It's about breaking up individual clips into their various relevant pieces for easy later acess. Is separating a 10 minute interview into a single clip from a tape the only use for subclips? Of course not, considering that single clip could potentially be broken down into dozens of subclips such as soundbites, reactions shots, smiles, nods, whatever pieces an editor might want to quickly grab down the road. Hope this clarifies it.
Saddly, the current organizational power of PP's subclips is next to zero since with their hard in/out points, they're of very little use. Adobe NEEDS to fix this ASAP!