The Entrepreneurial Q
You may find the story of Brian Bullock supporting your position. The real fortunate ones are those who get entrepreneurial training from birth.
I believe we can answer the question of “born vs. made” by breaking it into two parts. First: For a person’s propensity to start a business and to have the requisite personality traits, entrepreneurs are more often born. Second: When it comes to successful outcomes, entrepreneurs are more often made. That is how the complex interplay between nature and nurture works out.
Individuals with different ratios between “born vs.made” can emerge as successful entrepreneurs.