No problem about the numbers - I see what you're getting at. I think that your main point that it's not much fun, and probably not even feasible in this game world, to play out of Caribbean or smaller South American countries.
However, I don't think it's really an issue of traffic. If you want to play out of Havana, for example, you have to accept that demand for Heathrow will be only enough for one flight. And you have to accept that you'll never be one of the most profitable airlines in the game.
What you shouldn't really have to accept is that a strategy that uses a lot of thin routes, the type that these airports lend themselves too, leads to bankruptcy. I think that costs scale up too dramatically with extra destinations, so much so that it's really not worth bothering serving any route with under 100 demand per day, of which, I suspect, Havana has a decent amount.
Even the larger airlines which serve these routes are probably doing so at a loss, using the cash-cow trunk routes to subsidize the thinner ones. It's a shame, because there are a lot of cool airports and routes out there that would be fun to fly with planes like Embraers and could be sustainable in real life.
I don't think that it would be that difficult to decrease the amount by which costs, namely staffing and marketing, scale up with the number of destinations. I'd guess that Sami won't have time to respond to this, but I wouldn't mind hearing a justification from him as to why this is the case. To be fair, I'm sure he has one.
to make a REALISTIC attempt at a successful business, I have to jump to a white country.
And it's probably not that he just hates various ethnicities