I will say this - air conditioning costs to establish room temperature are inversely proportional to the degree the building is insulated. If your whole country is comprised of uninsulated or barely insulated housing stock, you have a MUCH larger project than simply buying some small window units for a few hundred euro per person and then paying a few hundred euros extra per year in energy costs.
Don't they have to heat them in the winter too? That also costs more and creates more emissions without insulation.