Sorry but judging from the Stallion's on show that is the case. Viewers want to see the best - that's the idea of promoting British Breeding!!
In A perfect World I am sure that they'd show all the Stallions - but there isn't time to show 48 stallions in one show. Do you ever see the also rans...
I think that as a first time event, the Stallion Expo has been a success. It's better to broadcast an event with a few teething problems, on TV, than not to broadcast at all. Sure, you will always get the eventers saying they didn't see enough of their stallions; the dressage folk saying that...