He's presenting himself and his exchange as the good guys so people keep believing in what ever he says and if you try opposing or advising people not to keep their funds on his exchange they'll defend the exchange like they have some guarantee that nothing can happen to Binance exchange. Cz is active in recovering stolen or hacked funds on the BNB network, his exchange or other associated projects and he advertise every operation that gets successful on twitter there by winning more people trust. He knows what he's doing and so far it's working in his favor but one day his tricks will fail him and he can't come out of the situation his exchange will find itself and then people will realize what has been said from the very beginning of not trusting any centralized service providers.
The problem with the trading system they have is that I would probably say the Binance exchange is quite good compared to the ones I have used so far. They continue to make improvements so that users are comfortable trading. Recently they have increased their VIP ownership program again.
We must be able to separate the problem between the security of money if it is stored on the exchange and the convenience of the trading system they have.