So why not control the discussion for the role luck plays for white males born in the U.S. between 1950 and 2010? It's obvious that factors outside our control

So why not control the discussion for the role luck plays for white males born in the U.S. between 1950 and 2010? It's obvious that factors outside our control are major factors in what we can accomplish in our lives, but that doesn't mean that within a controlled group the question of luck vs agency shouldn't be examined.