One of the biggest goals of the WBC is to grow baseball internationally. The tournament clearly does that in countries where baseball is already established. For most teams it feels like a do or die event, unlike the US and Canada.
But growing the game also means generating interest in non-baseball countries.
Most of the teams are real. The only ones that aren't are Italy, Great Britain, and Israel but including them in the tournament still helps IMO. Baseball rarely makes headlines in Italy, but it does during the WBC, and that's a good thing.