Not everyone who was born poor has the resources to get rich. Some our born with good looks, some gets lucky and some just doesn't really have anything. It is really easier to say that they should just get up work to get rich because we are not in their shoes but if you dig deeper into reality, they are just trying to survive. Getting rich requires taking risks and risks are expensive.
That's why it's poor because there's no wealth, and sometimes the majority of the world is also poor because of the lack of knowledge on how to get out of poverty or advance in life.
And there are others like poor people who no matter how much you teach or explain how to move forward in life, they cannot understand the advice given to them because their understanding is beyond their reach.