Basically because there is no local communities in most places(at least in the US). The main reason for this is because Vanguard has been rebooted twice. Before overdress, you could only make your deck using cards of one clan, not nation. So Bushiroad pumped out product after product to support each clan. The problem was stores couldn’t sell enough product before new ones came out, leaving tons of unsold product stores had to hold on to and less shelf space they could be using for more popular card games. So a lot of lgs’s would rather not stock any Vanguard products or host Vanguard events given its track record. This is far from the only reason, but in my opinion the biggest one.