... but I am yet to meet a single person on earth who is truly content with all they have and never want for something else. This is lucky of course...

I think I've seen people like that in a couple of dozen interviews... And you know, they really all (or most of them) said they were lucky. Lucky to have found themselves, their business or their passion, and now they are completely happy. But my thoughts are basically the same as yours. Again, you touch on a topic I've been pondering in my head without revealing it as broadly as you have done. Thank you. Again, something to think about....