So true. I have a similar story, and can add that people use all sorts of things to not work on the project. Smoking weed and drinking are common, but I have found analysis paralysis to be very common in smart people. Executing is hard for a number of reasons, and the hardest to get over is that you'll likely prove your idea sucks and was just braincrack [1].
[1] https://www.youtube.com/watch?v=0sHCQWjTrJ8 (contains cursing)