Most these countries had decent literacy and industry/proto-industrial base before WW2 or before becoming independent states. Singapore itself was richer than Spain in 1960 and one of the richest cities in its region despite the slums. This is why it makes no sense for example to compare China or India, they were just in a fundamentally different spot.

Regardless many of the strategies these countries used are increasingly difficult for low income countries to do as these countries (China is the biggest example) themselves are protective of these industries, there's no push for globalizing and as factories got increasingly automated.

That's not to say that I believe governance isn't important but the one's history is important for governance itself.