He answers your first question in the first paragraph: > There are plenty of studies that show that having a "purpose" and working after it is correlated with

He answers your first question in the first paragraph: > There are plenty of studies that show that having a "purpose" and working after it is correlated with higher happiness or well being. I'm not denying that what you mention can bring happiness, but you can do all that and still benefit from having "a purpose". Your answer can be helpful to some but it's the same as this StackOverflow meme of "How do I do A in B? Do C instead".