GTD doesn't consider priorities unimportant.
The blog post says "... get in the right context", "... find the time", "... find the energy". That's good advice, and a good add-on to GTD.
However, I disagree with the blog about how GTD works. It seems to be implying that
GTD consider priorities relatively unimportant. I don't think so!
As I see it, by considering context etc. first, GTD is merely saving
a lot of time and emotion and energy by figuring out quickly and painlessly what
you would have ended up doing right then anyway.