The life a fisherman wants is to stop and rest comfortably in the sun after catching enough fish for a day. This is his happiness. He doesn't need much wealth, and he can live without forcing himself.
Different people read this story and understand different meanings. In a word, mentality is a thermometer to measure happiness. Calm down and follow your heart.
PS: Rich means: it is a kind of happiness that pursues happiness.
Fishermen represent a kind of happiness that is content with the status quo.