I'm sure it's true that Bezos at 80 wouldn't end up looking back and cursing himself for failure at starting a company. But it's a little naive to overlook that a lot of people would. Decent careers aren't exactly growing on trees.
Careers are made by each of us. Forged in the flame of your passion to do something interesting and meaningful with your days.
That's why it annoys me when big brand companies call their job section "Careers."
You get a decent career by taking risks and pursuing challenges. Going with the flow gives you a mediocre career – and who wants that?