Whoever keeps millions on a centralized exchange is an idiot, period.
I'm not talking about whether they store their bitcoins on centralized exchanges or not . What I just want to say is that there are many sharks with millions of dollars still using centralized exchanges as a place for trading and liquidity because we all know that only centralized exchanges provide such massive liquidity to the market. And when we use centralized exchanges, it doesn't always put us in danger just because some people know we own bitcoin . I understand that we will definitely lose privacy when using centralized exchanges but there will be no danger like you are mentioning .
Don't get me wrong, I am not advocating or encouraging people to use centralized exchanges because it is everyone's choice but there is not too much danger when using them properly.