I must have misread you, I'm sorry. I got the impression that you were trying to state that the way you think about ideas, and idea-tracking (or the lack thereof) was somehow "correct" in some more objective sense.
I got the impression that you felt that if someone had to write down an idea to remember it, or if someone wasn't immediately capable of implementing an idea, that the idea itself must not be worth saving or implementing. I didn't get the impression that you were saying "this works for me, this might work for you" -- rather, I heard (or saw) "the problem you're addressing is a non-problem. tracking ideas is a wasted effort. period.". If that's not what you meant to imply, apologies.
I don't think that your solution removes the issue at its source if the issue is remembering ideas that you want to examine or implement in the future, either. If the issue is only having those ideas on hand that you felt were good enough that you remember them no matter what, then your solution works fine. If that's not the issue, then your solution only works in the sense of repainting the issue as a non-issue, unless I'm missing something fundamental about what we've been talking about.
I don't disagree that most people overvalue their own ideas, that's pretty inarguable.
I probably overreacted a bit -- as an explanation, this is a bit of a personal topic for me. I struggle quite a bit with remembering to do things, or remembering things I want to do -- and I also don't have very much time to devote to pursuing what I think are good ideas.
Without a means for me to jot down stuff for me to think about or work on in the future, I wouldn't ever come back to scratch any of the things that were making me itch in the past -- and scratching those itches tends to be better for more than just me.
This is probably partially because I, like a lot of "hacker types" am ADD. I don't mention that as a crutch or anything, but it is something that went undiagnosed in myself for a long time, and that definitely contributes to the "problem". I can not rely on my memory alone.
I can't really express the difference in how I'm able to "be productive" when I'm medicated and have a system for idea tracking versus whenever either of those are not present. It's a big, tangible difference, and this is the case for a lot of developers I know even when you take medication and ADD out of the picture.
Perhaps another semantic thing that should be mentioned is that the vast majority of my ideas are "change functionality of library X to include Y", "write script to do Z", "little app that does this", "configure app FOO to work with input BAR". I'm not necessarily talking about larger ideas.
Anyhow, I hope that clears some stuff up.