This metaphor will be rather lengthy and disconnected from the situation, but I think it’s the best way to explain it. Let’s say that an airline is a bakery. They have an oven that they can use to make any kind of cupcake, but it makes them in batches of 500 (around the average seating load of an A380.) Let’s say that somebody who wants to fly from Perth to Buenos Aires is represented by someone who likes caramel carrot cupcakes.
They exist, sure, but there aren’t a lot. If the bakery made a batch of caramel carrot cupcakes, they’d throw most of them out, and lose a lot of money.
You’re saying that because the bakery doesn’t make caramel carrot cupcakes, they can’t make caramel carrot cupcakes, and therefore they can’t make cupcakes with caramel at all. They can. But it makes no sense. However, plenty of people like caramel chocolate cupcakes. And the bakery makes them. I’m showing you a caramel chocolate cupcake. But you keep on asking why there aren’t any caramel carrot cupcakes. I'd go on, but that would be stretching the metaphor.
I'll participate in your investigation, though. For the sake of argument. But just a couple of quick things before I start:
1. Have you already found these routes, and if so could you just post them and let us check them? It would save a great deal of time for all involved.
2. As an experienced flyer, let me just add before the debate starts that lengthy layovers are common on lesser-flown routes, because plane schedules don't always line up. You can spend a comparable amount of time in airports as you do in the air. I had a 12 hour layover in Dallas once, which wasn't fun. Just in case I see where this is going.