That would be appropriate to avoid the risks of getting scammed and any other forms of fraud. It is good that China is aware to the increasing cases of money laundering to protect their people's wealth, unlike any other 3rd World Countries, they just really don't care and let their people be trapped in an endless waves of fake ICO's 
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That is why, until now there is no significant changes in their economy.
You have great point also that the China government were only concern about the welfare of the people so this is a way for them to discourage or to let them avoid in getting involved on so many fraud and scam ICO. Airdrop were also one of the best way to scam people just like the many said that people will going to buy some of their coins after receiving their tokens but still it will just abandoned their project and will run away after they collected some funds from them. . That is why, until now there is no significant changes in their economy.