Source availability doesn't really feel relevant to a discussion about why most people don't use it. Most people don't know anything about open source.
Stress, anxiety, excessive worrying, etc all have reasons and causes you could use to justify them. Mindfulness is really just a deeper state of awareness and introspection. Observing your mind and beginning to see the patterns of thought and behavior that cause you unnecessary pain and suffering, and experimenting to find healthy solutions that work for you.