And yet we constantly get new nations on board, just not yesterday.
Sure from the dark it can look expensive, but given that dirt cheap horses (sometimes the ones who were literally free, or coming from a Craigslist ad) have made it to the very top of the sport, including the Olympics, it's not nearly as simple as that. Just take a note of Laura Graves and Verdades for instance.
And as for Hungary, there is a tradition. From Gyula Dallos winning a medal at the European Championships to Hungarian sport horses taking part at the Olympics (even if for other nations). Obviously there is something going on in Hungary... Just because nobody is actually watching taekwondo in Croatia, it doesn't stop us from collecting medals at every World Championships.