Sounds plausible....is plausible....is reality. The likes of Nike, and Addias, wouldnt keep creating images of bare-footed kids in tiny villages, dirt pitches without a lick of grass, without a true Goal (with posts and crossbar) creating a game out of nothing if infact in reality this wasnt actually taking place every day around the globe.
Now, it clearly isnt the only reason, but you wont find "corporate" image campaign built around this "game" out of nothing but a dream in Baseball, Football, Hockey even. Soccer is perhpas the easiet pickup game to create when it comes to equipment needed.
Yes, the British Empire's global reach influenced alot about the adoption of the game but that alone doesnt equate to its global continued adoption and acceptance. Ultimately, in non USA locals, this is the only game and greatest game for its simplicity.
I love it for that, but hope it continues to modify its rules to maximize its appeal to USA.