But in his thought experiment what you're trying to avoid is being massively disadvantaged by where you were born.
If you're born in Scandinavia you'll have very good education and healthcare no matter what family you're born into. Maybe starting a business is harder, so what? You can move to the US later in life if that's your goal, you'll still be better off by having no student debt.
In the past this was a murkier trade-off as the cost of immigration vs the cost of student loans was much closer.
Nowadays, however, I'd say that it's possibly the better route to take from a debt standpoint, but there is still the reality that being able to move to the US (or most other countries) is not a guarantee normally.
If you're born in Scandinavia you'll have very good education and healthcare no matter what family you're born into. Maybe starting a business is harder, so what? You can move to the US later in life if that's your goal, you'll still be better off by having no student debt.