The title "Do your work" refers to growing your own business. We all have some skills in different sectors and we use all of our energy to work for a company and get a monthly salary. But we are not supposed to work for that company till death. so how will we bear our living expenses after retirement? Most people do not think about that.
Not everybody will have their own business. Not everybody will be an entrepreneur. Your goals and dreams are different from that of the next person and that's fine. So there's no point making people feel less ambitious of about themselves. There's is something called a "career" and many people would like to build theirs. People gather skills and experience over time and keep growing in whatever they do and in whatever company they work in. I have met an entrepreneur that's regrets starting a business because it got too complicated. So just do what what works for you.