I agree. I think people have a difficult time with this idea, though.
I have more than seventy projects in OF at the moment. (Not tasks, *projects*.) I have, on occasion, added a project that was already there. In order to minimize this, projects cannot be thrown into some kind of gigantic junk drawer; they have to be sorted. I have, for example, 9 active projects and 6 projects on standby in my "Work" folder. "Work" also contains six subfolders, related to the various different kinds of work I do.
It is not possible to rearrange the projects by priority, since it is not possible to put some of the projects in my "Personal" folder above ones in "Work," but have others below.
I'm very glad that GTD works for some people. However, after spending quite a bit of time with it, I find Mr. Allen's obsession with "open loops" amusing but irrelevant. I do not waste time fretting over ideas I haven't captured, and since I do most of my work at home, and tend to have my phone and laptop with me all the time, "contexts" is helpful, but quite inadequate. I'm almost *always* in/at the contexts that have the most items in them.
There are a lot of "To Do" list programs out there. I've looked at an awful lot of them. Most of them are cute little toys, nice for people who have nicely organized brains, or maybe pleasantly simple lives. LifeBalance came fairly close, but their inability to add scripting for years left me unable to add the extra abilities I needed to make it "good enough" for my life. OmniFocus is the most powerful program I've found to date unless I would be willing to try adapting industrial team-focused project-planning software to my needs. But even OF isn't quite good enough yet.
When some mechanism for prioritizing my tasks and projects finally appears, am I going to spend all my time reprioritizing things? Of course not; how absurd. Instead, I'm going to be able to just look at the top of the list of "next tasks" in my "At my computer" context, instead of wasting time having to scan through all twenty-seven (currently) tasks showing up there, trying to decide which one is the one I should try to do next.
I can only hope Mr. Allen would be embarrassed by people who believe he has found the One True Way, and anybody who uses different tools for organizing their life must therefore be Wrong.