Friend…
There is a proverb saying, "do not measure clothes with other people's bodies." That is. The merchant may be right through his business analysis, he feels what the fisherman is doing is too simple, watching and unbeneficial. Dredge the wealth of nature for the sake of getting the money and wealth as much as possible is reasonable for him.
As for the fisherman, with a simple mind, able to accept whatever given by nature with satisfaction and sincerity. So life is lived every day with gratitude and happy.
Indeed, the size of "happy", each person must not be the same. All return to sincerity and the way we are grateful, whatever we have today ..
enjoy this life with gratitude and faith in steel, for life is a change to death.