Your country sounds highly unusual. Are these government jobs? Talking about naivety, this certainly doesn't seem like it's true generally.
Also note that I said US offers a lot of economic opportunities not that other countries didn't. And I was talking from the perspective of a person from a developing country looking to travel to a developed country. Sorry if that wasn't clear.
I've met enough international students to know different countries have different strategies to bring the knowledge home. Some have 2x time retainer for whatever length one studied on their expense. Others have guaranteed government jobs. Mine had any general engineering/it jobs in the private sector. Where are you drawing the conclusion from that this is the exception?
I fully get that a STEM graduate has an easy life in USA, we have that anywhere. But you have to look at regular people, with average jobs. What you refer to as "developing country" most of the time offers better free healthcare that the top notch USA option that's simply out of financial reach.
Not to derail the discussion but just to illustrate. Canada just brought a law for maternity leave to be up to 18 months, paid.
Also note that I said US offers a lot of economic opportunities not that other countries didn't. And I was talking from the perspective of a person from a developing country looking to travel to a developed country. Sorry if that wasn't clear.