Why should successful countries like Poland or Czechia join the Eurozone and risk importing ECB monetary policies?

2/2 Comparison of GDP per capita between Slovakia which joined Eurozone in 2009 and Poland which did not adopt Euro.

Any comments?

Chart @Pekao_Analizy pic.twitter.com/bnHBuZNyum

— Michael A. Arouet (@MichaelAArouet) February 7, 2024