> China doesn't excel at soccer because of authoritarianism and because the sport is not well understood by anyone and central planning doesn't help
It's hard not to be mean to someone who calls it soccer :-), but this betrays an obvious lack of familiarity with the history of this sport.
USSR, Czechoslovakia and Yugoslavia all had very strong national teams, pretty much until they were dissolved. Clubs from the communist bloc did not dominate football, but put very convincing performances and were routinely represented in the higher stages of European competitions. Red Star Belgrade and Steaua Bucharest won the Champions Cup within a few years of each other -- all this while players trained in sub-par conditions, worked with sub-par equipment, had access to sub-par medical conditions, research and treatment, and were usually unable to play abroad and further their career at the truly major European clubs.
If anything, the quality of football in most ex-communist countries, Russia included, has steadily declined. Poland and Croatia are the only major and steady exceptions (Ukraine, the Czech Republic and Romania enjoyed some brief stints but not much else), and it's probably no coincidence that their national economies are faring better than those of most ex-communist countries.