Your area isn’t everywhere.
Part of the reason registrations are down is because OMG, we can’t have Amish with Saddlebreds! So they are breeding, selling and showing Morgans, DHH & roadsters. Unless it’s mare to breed to a DHH, most won’t take an ASB as a gift. They are the equivalent of a Ford Pinto or Hyundai Accent - cheap and prone to breaking down.
At least half of the shows in the Carolinas are non-USEF and no one is upset about that. The park classes fill, as do the open pleasure, CP, Show pleasure have at least 5 entries. There plenty of gaited horses and driving horses and ponies. Generally only one or 2 fine harness horses, a cob tail pony & a harness pony or two. The hunter & western classes have 4 or 5; a nice class, but not enough to split…
You know what is great about the Hackney people? They don’t pretend ponies are everything to everyone. If you want a road pony or pleasure driving pony, great. If you want a hunter, try a Welsh.