Check out Tony Robbin’s TedTalk. Essentially, he claims that it’s not a lack of resources, but a lack of resourcefulness. Many times, someone who is ambitious enough, driven enough, and determined enough will find a way to succeed as Sean Smith did despite their perceived lack of resources at the outset.
That being said, there are a number of factors that are indeed out of our control that you brought up (illness, financial situations) that would impair travel and learning. Food for thought.