This is literally “pick yourself up by your bootstraps”. Get busy running is not a thing underprivileged kids can do.
Undeprivileged kids can try harder or less hard, same as privileged kids can try harder or less hard. The starting position makes a huge difference. Whether one tries or not also makes a huge difference.
At its core it’s the difference between believing anyone can succeed and believing outside factors are much more impactful than working hard. In America it is often times a conservative b liberal mindset.
It's a thing privileged kids can afford not to do. Underprivileged kids absolutely have to get busy running to get anywhere.
“Get Busy” sounds good when there is opportunity to improve. My point is that many people who are in a situation where working harder does not result in success. They do not have the tools, knowledge, access, etc to turn hard work into success.