That was an eye opener. Thanks a lot for sharing. I really used to wonder how such people motivated themselves until I read this "Thousands of parachutes were made during World War II. Workers stitched eight to ten hours a day in what can be best described a tedious job. However, when the workers were made to realise that what they were doing was actually life-saving work, the deeper purpose buoyed the workers when they realised the importance of their contribution. This is an attitude that is driven by a deeper purpose and not a forced attitude. This is how even mundane tasks can be fired by the right attitude" I guess as shown in your ppt, some jobs are tough despite deeper purpose.
Every argument is relevant in a context. While I agree with you in the context you are referring to, it is equally true that some of the greatest successes in history have come becasue people have chosen to do what they love to do and where they excelled. In that context, this is also true-Make your passion your profession-
Make your passion your profession(Work prisoners and students)