Be my guest and offer those payment methods to those countries.
Though I suggest taking a look at the list of countries that make part of NATO's Least Developed Countries (LDC) list. You might find some countries in that list which are a high fraud origination countries.
We as a business choose not to deal with countries like these, as they'll only push our overheads up. This is our choice and I don't expect others to follow. We're simply looking at the risk associated with dealing outside of paypal and credit cards, and have decided that as a business, we wont accept those other payment methods. Our customers are happy with the payment options we offer, no one has asked for any different, and our customers pay on time. Everyone wins.
If you wish to service that market with alternative payment methods, be my guest. I might even see my fraudulent order rate drop if you do.