This post feels like something written during the "honeymoon" phase of the latest trendy technique. I would take it much more seriously after you had stuck with it for several months, had made some sort of measurable improvement in your rationality (maybe count how many times you notice you are confused and it turns out there was something confusing), and had some understanding of its limitations, or alternatively, understood why the intuitive reaction to it being too good to be true was fallacious.

I've been involved in lucid dreaming for about eight years now and teaching lucid dreaming for two, so I'm pretty familiar with it on a non-surface level. I've also been explicitly looking into the prospect of using lucid dreaming for rationality training purposes since 2010. I'm fairly confident that it will prove useful for at least some people.

It doesn't seem at all obvious to me that training yourself to become less confused in dreams will translate into training this skill in real life situations. For example, the relevant part of your brain might be normally shut down during dreams for maintenance or rest of some sort, and doing this training might reactivate that part - causing it to function less optimally in real life. I believe Richard Feynman hypothesized something similar to this regarding lucid dreaming.

It didn't seem obvious to me either-- I originally began getting interested in lucid dreaming solely for fun. Indeed, I was somewhat surprised to find that it seemed to have other benefits. That said, I do think those benefits are real.

Author's note 10/19: I've edited the first bit of this post into the OP following remarks from other users but am leaving it here as well to maintain the flow of the discussion.