"Why does Joe procrastinate a certain task? Because of some thought. There's a thought--and if he changes that thought, he will no longer procrastinate."
Such a view is common, and probably very inaccurate. Human behavior isn't necessarily governed that often by one thought.
There are many, many books and articles on procrastination--and although procrastinators often read such books and articles, they seldom make much progress in avoiding procrastination. Why? I think it's primarily because the ideas that circulate about the topic of procrastination tend to be rooted in the narrow mindset that sees too much from the standpoint of one thought.
In order to be regarded as a procrastination expert, you're expected to analyze matters by using that mindset, and offer a fairly simple explanation and solution that relies on the idea that a certain thought needs to be changed. If you deviate from that path and you view the matter form a different mindset, it's very unlikely that you'll be regarded as a legitimate expert on the subject. Our culture has established a protocol, and it's difficult to receive society's rewards if you don't stick to that protocol. The public is very receptive to experts who take up the standard mindset, and very unperceptive to anything else. Unorthodox mindsets tend to be discouraged.
It's difficult for the world as a whole to actually learn about a topic like procrastination, if the "one thought" mindset is so firmly entrenched in our culture.