I'm reminded of Ze Frank's "Brain Crack:" https://www.youtube.com/watch?v=0sHCQWjTrJ8

The idea is that unexecuted ideas can actually become addictive. You keep telling yourself, "boy, that thing is going to be amazing whenever I get around to making it!"

And the more you tell yourself this, the more you become petrified that it won't be great, making you even less likely to actually work on it.