Oh. I don't disagree and the habit thing is definitely part of it. When I'm traveling I find it very easy to get out of the habit of getting something/anything down on paper quickly even with the expectation that I would need to knock it into publishable shape when I have more time.

Personally, I'm also guilty with a number of things of the mindset that it's not worth chipping away at, it's too much to contemplate, etc. Writing can definitely be similar.