Statistically, people with master earn more and it's easier to get a job (other options are: you get aquihired, have a shit of money; your parents have lot of great connections etc.)
They guy I was referring to in my post above, started with a certain wealth (even if that wealth is in a form of a 200-sheep-herd), a certain skillset (assisting his father in the business while growing up, having a 'knowledge base' right there in his home, having connections, having the equipment). What has gotten him to a few thousand animals since, is hard work and "invest in knowledge as you go". He didn't start from scratch.
The benefit with his line of business, is that the wealth/skills-handover was happening since he was 10 (experience, skills, knowledge). If one is to become a doctor, the mental training may start early on, but the actual knowledge is coming much later, and at a greater cost ($)(especially in the USA).