Dropouts include Gates, Jobs & Zuckerberg!! If the corresponding universities they were enrolled in took note of their talents very early, they would have never dropped out. May be, these people are beyond the University curriculum!!
When they were in educational institutions, their attitude and interest were different and apathetic --- could not show and utilize at student time. After dropping out educational institutions, circumstances force them to bring out their positive interest, attitude, creativity, and entrepreneurial intent.
So, few become successful and popular as they are. No doubt they have greatly impact the people's lives.