Every junior developer should know this graph

Basic economics of investments and running a business? This is so basic that it's common sense: invest in new employees and train them to make them productive and eventually turn a profit or increase your profit. This is the simplest way to explain capitalism even.

Also shouldn't this be something that a hiring team or business owner should know? I can't see this to be helpful advice for a "junior" developer. Is this implying they should go ahead and explain such a basic idea that it goes without even saying to their potential boss during a job interview? That would be so condescending and outputting they would not be hired lol