How career dreams die. What it takes to dissuade people who have no chance at a career from wasting time/money/effort/resources on pursuing that career.
It takes a lot, and it takes knowing what failure looks like during that time.
Entrepreneurship is a career, not a fall-back system.
Few folks have the temperment, patience, dedication and energy required to really succeed.
Those who have the necessary qualities are going to be entrepreneurs no matter what is said to them.
The rest, should focus on a career/job that is better suited for their skills and persona.
It's not easy. It's not supposed to be easy.