Some people does not constitute 99% so he is wrong. Even majority does not mean 99% of users. I understand why he made a public statement because he is losing huge amount of funds that should had been kept in his exchanges. The statement of CZ means he is somehow worried that his client ends up withdrawing their fund making his business lost millions of dollar profit. So it is normal for him to encourage people to put their trust on exchanges. It is his business he is promoting after all.
It is the same when an exchange where your fund is kept got hacked. Binance is just lucky that their previous hacked is just a minor one that they can reimburse client of the losses but what if it became a major hack where almost all funds is drained. Do you think Binance can afford to reimburse all their client's fund? I think no. I would rather lost my coins in my own fault than letting others fault to make me lose my money.