You work there 3 years and you'll earn a million bucks. Plenty of life to live after that and a lot of money to do whatever it is you want. Many people are willing to make that tradeoff, perhaps not you though.
If your children hate you or you lose the love of your life -- or you ruin your health -- then what's the point of all that money and free time?
Ultimately it's a decision that you'd have to make depending on what you care about. You could turn your question on it's head; what's the point of having children or a significant other if you are incapable or unwilling when you could be making money for the things you do care about in life?
That's a good point, actually.
Which I will bookmark as the perfect description of the kind of personality profile that is most suited to working at Amazon-- and perhaps the only personality type that can thrive there, actually.
I prefer a bit tougher job that means I'll be financially free in 10 years. It also means my wife doesn't have to work and can really focus on raising our children.
I've worked some long days, but not 16hrs. Plus I really dig the projects I'm on.
You can ruin all that on a 70K job.