Complete independence in weapons industry remains a mirage, a dream, for many countries.
Only a few countries, which are big enough, upwards of 500 million people may be, are able to pull it off.
Ultimately, the single most important criterion is the size of a country's population.
Smaller countries, or medium sized countries, are bound to be less powerful in the grander scheme of things. Ceteris paribus. Holding other factors constant.
Since all countries in the Middle East, Balkans, Central Asia, Caucasus or North Africa are small countries, you get the result you see.
Much bigger countries from outside can come in and do anything they want.
Population, population, population.
It's all about population.