Suicide rate in Korea is 21.2 per 100k Suicide rate in US is 14.5 per 100k

Drug death rate in Korea is 0.16 per 100k Drug death rate in US is 18.83 per 100k

And I only did the US and Korea because I only know the US. My conclusion is South Koreans feel about the same as Americans but do way less drugs.

South Korea has the 10th highest suicide rate in the world.

Plus, that explosive growth has ended. South Korea escaped poverty and now its growth rate is comparable to western countries with much better suicide rates.

Also the gap between Korea has remained constant since the 90s (in fact it even widened over the last 15 years or so)

It's apples and oranges. Compared to the U.S., how much did western Europe and Japan advance in the half-century preceding 2000, relative to where they started in 1945?

(What have you got against being happy?)

Let's say your true ability is A and you have one measurement M1. The variance (or, let's put it in another way: the probability that your M1 is waaaay different from your A) goes down if you also get M2, M3, M4 and take an average.

In other words: your measurements become more precise and the stress goes down a lot

That you can take SAT tests multiple times as pointed out in sibling comment, that could change the dynamic but doesn't seem like a fundamental change, I think there is still the path for "the test" to become such.

plus as children / young adults, many are still developing so you want to push testing as late as possible

Just curious, what is the average prison sentence in Korea for a 16-year old found guilty of buying Adderall online?

The "resourceful youth" have to deal with a competitive environment, highschool bullying, exams, so they have a lot to do.

Prison sentence for drug use is up to 5 years.