That's a great sign for growing global interest and participation in the game.
Of course, Venezuela, PR and DR (and Cuba, etc) were already very
into baseball, but it does suggest that their player-development engines and talent ID are about as good as ours at this point. Which makes it replicable once the game hits critical mass in a country.
In terms of growing the game, which is most of the point of the WBC, countries like China, Czechia and Australia. Here are the number of domestic-based players on the final-tournament 30-man roster
of some countries (suggesting their domestic league isn't a joke and they don't have to rely on hyphenated Americans playing in NCAA / indy leagues):
Netherlands: 7 (+5 in Curaçao)
Great Britain: N/A
And from qualifiers
Nicaragua: 19* (out of 27)
Argentina: 12 (+2 likely; roster was only 16 total)
South Africa: 11 (+11 likely to be domestic-based)
Panama: 9* (+5 likely domestic)
New Zealand: 8 (of whom 5 play for the Auckland ABL team, i.e. pro)
Brazil: 3 (+6 likely to be domestic; definitely didn't know Brazil has a domestic league
Great Britain: N/A*
* = Qualified to WBC
What I take from that is that the most promising leagues that you'd want to put some development into and try to make them fully-pro and self-sustaining are China, Czechia, France, Germany, Italy, New Zealand and Brazil. All but China are amateur, and NZ has that Auckland team
in the ABL (and which counts Tzu-Wei Lin on its roster), but also has a domestic amateur league that seems well-organized
. Also, I knew the leagues in Venezuela, Colombia, Cuba and Mexico were all professional, but I didn't know the same was true of Nicaragua
(5 teams), Argentina
(6 teams) and maybe Italy
(6 teams) too.