Governments that completely reject Bitcoin: ((which is the most important part))[/b]
Most of the governments that refused to allow their citizens to buy and sell bitcoin were from poor countries that have a weak economy, as these governments see that the process of buying bitcoin will lead to the emptying of bank accounts in the country of the local currency that will go to an unknown destination.
well there are only a handful of countries out of nearly 200 that have actually banned or rejected bitcoin but when you look at the bigger picture many of the countries with very poor economy have not done that, some of them even accepted bitcoin like Venezuela for instance.
what you explained also may make sense in theory but in reality the volume is too low that it won't matter at all. for example in many of these poor-economy countries the total bitcoin trading volume (not just buying but both sell and buy) doesn't even reach $10k.