East Asian development was not based on protectionism, it was based on providing goods/services for export (even when "weak") which requires openness to competition on a global scale. Protectionism was tried in Latin America and even in India prior to the 1980s and 1990s, and it has consistently been a failure.

Please read your history, protectionism enabled the US to rise out of the dirt and become an industrialised nation at the time when British Empire dominated world stage. This is not even a subjective matter.

Tariff rates were used for government revenue at that time, that's why they had to be high. It had nothing to do with endorsing protectionism per se, and the U.S. got an income tax later on to fix this issue.

Are you arguing protectuonism was unintentional, or that it was ineffective?

Exporting relies on the destination markets being open, not yours.

Domestic markets were kept relatively closed in order to foster development of local industry and companies.

Yes. Import substitution protectionist policies have been an ongoing disaster for Brazil and Argentina for nearly a century now. What countries like South Korea did was quite different.