How do you see the father?
This kind of story looks like a made up story since I read many instances like this online just to bring a real world case scenario of gambling to people virtue.
I think the Father decision on this case might be based on religion or philosophy since I have a pastor that declined our church member money offering that came from a lottery win. Maybe the father on the story is holding in to something that makes gambling profit bad.
Was he right by rejecting the son gambling win?
On practicality, A money is a money so he should accept the money especially if they are poor since the son only risk very small amount just to get it. But in father perspective or if you are viewing this with same ideology then I think the decision is right since it’s based on what’s your life guidelines to determine good and bad.