Simply because this is not how it works. If what you said is true, we would have a pretty defined route out of poverty that everyone could follow. Now go ask the opinions of those trying on daily basis and not making it.
You seem to be regurgitating things that rich people that think that they succeeded on their own (when their parents payed for education or at least payed for everything else for the kid to focus on studying only) says to justify what they don't understand.
What gets someone out of poverty is 'foundations'. If you have to work full time to have a roof over your head, you already lack 2 of the basics, being money and time.
If you have money, you can create time.. if you have time, you can create money. If you lack both, your only focus is to surive and this consumes both time and money.