Banning ICO is not destroying cryptocurrency. In fact it helps the crypto to clean bad or scam coins that is or would circulate the market. They are protecting their users to avoid scam. Besides if the ICO is real, they will find a way to advertise their project in other Social Media.
You are completely right , a lot of people seem to fail to see that. Most ico's don't even need the amounts of money they are asking for , and if your coin is good people will come in eventually.