Regarding: "What’s blocking you from working on an altruistic project?"
Recently I took an online course about managing time and projects, including motivation and follow-through, and one of the most valuable take-aways I got out of it was this:
There are three basic reasons people procrastinate:
I have presented this insight into the nature of things that block people from achieving what they want to achieve to lots of friends in my personal life since picking it up from the course, who report finding it helpful in untangling what was preventing them from moving forward.
I am currently inclined to add one more, since I see it reflected in so many of the other comments, and in things I have heard from my more sensitive and idealistic friends.