When a group of successful countries are selected for study, we cannot be sure that all their characteristics have been conducive to development. Furthermore, EA countries are very different as for the role of government versus markets, institutions and culture.
Development is a complicated process, compared to combination lock.
Hence, several different roads to development may be possible. Free markets combined with prudent macroeconomic management, non-distorted prices and public investment in education, infrastructure etc. Strong policy interventions, promoting certain sectors. Cultural, geographical and institutional, etc. reasons. New industries are not competitive without protection from foreign competition.