Wonder how much money they cost themselves if the US doesn't advance? Japan is rich and cares about baseball. Mexico, Dominican republic, and Cuba are not rich but care and Mexico is big. What other countries have big baseball cultures? Do the snow mexicans care? Or are they all in on hockey? Other Asian countries outside of Japan?
Japan, South Korea, Taiwan, Venezuela, Dominican Republic, Puerto Rico, Cuba, Panama, Nicaragua, Mexico, Colombia, and the Caribbean parts of the Netherlands really care about this tournament and desperately want to win.
USA and Canada kinda care but it's more niche. We would be the only two with a significant population who likes baseball but not this particular tournament.
Czech Republic is a team made up of plumbers and electricians who are passionate about it, but not a lot of baseball fans there. Great story though.
Australia cares a little, but baseball is not big there. (They are probably the best and most passionate sports country in the world on a per capital basis, punching above their weight in everything.) Brazil is in a similar boat.
Italy, Israel, and Great Britain are fake teams almost entirely full of Americans. They should either field real teams like the Czechs or stop having them.
That covers the 20 participating countries.