Opprtunity is not equal. Society is massively unfair.
Tell homeless children on the streets of Rio that they just need to find the opportunities. That is just a major insult.

And I can succeed,even if my opportunities in life have not been the best. But that is me as an individual. I can succeed despite being a poor working class guy,without connections and resources. DESPITE those things.

If I had money,I could buy a music studio,a maid,and a personal assistant,and a caretaker of my child. That is what rich people do. It frees up their time and energy. So they can realise their potential.
You need a certain amount of resources to even get off the ground,which experiments with a Univeral Basic Income has shown,as well as cash tranfers.
People show remarkable resourcefulness and willingness to work,when they are not caught in a poverty trap, too exhausted just keeping their head above water.

https://www.givedirectly.org/research-on-cash-transfers

http://onlinelibrary.wiley.com/doi/10.1002/14651858.CD011135/abstract

Poor people don´t lack initative, intelligence or resourcefulness. They lack cash.