Death of Salesman v.s. Gatsby Quote

"WILLY: Why did he come home? I would like to know what
brought him home.
LINDA: I don’t know. I think he’s still lost, Willy. I think he’s
very lost.
WILLY: Biff Loman is lost. In the greatest country in the world a
young man with such — personal attractiveness, gets lost. And
such a hard worker. There’s one thing about Biff — he’s not
lazy.
LINDA: Never.
WILLY (with pity and resolve): I’ll see him in the morning; I’ll
have a nice talk with him. I’ll get him a job selling. He could be
big in no time. My God! Remember how they used to follow
him around in high school? When he smiled at one of them
their faces lit up. When he walked down the street... (He loses
himself in reminiscences.)"

This quote suggests that the Willy thinks if a person works hard and is attractive, he will get rich. Like in The Great Gatsby, Gatsby's father believed that Gatsby was destined to be rich because of his hard-working and self-improving attitude. Plus Gatsby is also handsome. This shows that the characters all believed in the American dream. They all thought achieving one's goal (in this case, to be rich) requires only one's own effort; in other words, the concept of the self-made man.