But that doesn't change the fact that every single one of Amazon employees is free to leave the company and start their own tomorrow. You don't have to have complete financial security to be "free" to do something.
You don't. You can start small, out of your own bedroom if you have to, and then grow from there. There's plenty of stupid advice like "if you're not making million dollars within 3 years of starting then there's no point" but it's just not true.
So they have to prioritise what is important, if they feel that starting a business is more important, they will avoid getting financial obligations and starting a family.
This is also part of the overall risks, you might be better off just being an employee with a normal life instead of being a failed entrepreneur.
Of Course a rich kid won't have to do these sacrifices but the rich kid will probably not have the same intensity and drive as the middle class person who wants to succeed.
90% of people are strapped into financial obligations and have families. None of these people can afford to risk starting a business, even if they would be good at it and had the money, support and contacts required. Even among the usually already wealthy people who can afford to risk a startup, 90% of them fail.
What you're really saying is: if you inherited the freedom to risk creating a startup, and you are one of the lucky 10% who make it a success, then you deserve to enjoy the rewards.