Things are different if you're worried about putting food on the table a couple of months from now.
Having met Bill since that time in other contexts, it is clear to me that he had a much bigger picture in mind than my high school self could conceive of at the time. I'm not sure he forsaw all of what Microsoft became, but he saw a whole lot more in the future of microcomputers than I did.
Your theory is also decimated by Paul Allen.
Those two never had to worry about starving to death, because they made sure to generate sales from the very beginning. Microsoft was started for peanuts, they lived on peanuts in New Mexico, they drove sales, and that was that. It would not have mattered if it was two Paul Allen's coming from a middle class background, or a Gates and Allen. One thing mattered: sales.
You know why Allen wasn't afraid, despite lacking the Gates family money? He knew he had the ability to go get a well paying job at dozens of companies, he had a valuable skill.
They didn't have to worry about staying fed and sheltered, because they generated revenue immediately. They built a real business.
Please don't make needlessly personal accusations in HN comments. This comment would be much better if it started from "Many people were given even better..."
(Thanks—added.)