Question

It is written in the Talmud, Beitzah 20a: “There was a certain man who said to them: Give so-and-so four hundred zuz and let him marry my daughter. Rav Pappa said: He takes the four hundred, and as for his daughter—if he wants, he marries her; if he wants, he does not marry her. The reason is that he said: Give him, and let him marry. But if he had said: Let him marry, and give him—then if he marries, he takes it, and if he does not marry, he does not take it.” Is the issue here the estimation of the intent of that dying man? {And then in every place and time one would need to make a fresh estimate again?}