One need only look at Zimbabwe and South Africa to see the truth of what you’re saying. Or look at Japan. They were mired in the doldrums for a long time due to isolation and an outmoded feudal system. But less than a century after Perry opened the Japanese ports, Japan was a powerful nation. They were able to defeat Russia in a war, conquer massive China, seize most of East Asia, hit us at Pearl Harbor, and hold their own against us for several months until we were able to turn the tide at Midway. Even then they kept fighting and we had to firebomb one city and nuke two others to finally bring them down.
And within a few short years, Japan was a world economic and intellectual power again.
Is any African country capable of that? They’ve been exposed to Western ideas for quite a while now. Yet their progress seems to be based on how many westerners are present in their countries. Every white westerner in Japan could leave tomorrow and the country would still flourish. But if every westerner were to leave Africa, and no one else were to move in (such as the Chinese), what would happen there? As bad as it is now, imagine what it would be like then.
Challenge the science if you will, but don't deny it simply because it makes you uncomfortable. (Addressing the editorial "you," not puroresu directly)