The rest of those sayings are just for us plebs that have to rationalize working 40-60 hours a week.
There is no sociopolitical statement, no call-to-arms, no pontification as to the measure of one's life, no generational implications. There is an existential consideration, but not of the nature your post implies.
Happiness is an individual choice, available to us all at any time.
Full stop.
This is pure magical thinking. There are many reasons to be not happy. Being in pain, having lost a loved one, not having your physical needs met and well simply having depression or a myriad of other problems.
And people shouldn't be happy with all circumstances. It is not healthy to be happy all the time. Sometimes accepting the negative emotions is important for growth.
What you're promoting is a deeply narcissistic worldview, and I hope either the cure or the consequences reach you soon.
Though maybe those are going to present as the same thing.
