All transactions are public. People can simply crawl the blockchain for addresses that have a good amount of money and then check which of them they can relate

All transactions are public. People can simply crawl the blockchain for addresses that have a good amount of money and then check which of them they can relate to persons. If they know you and how much your crypto net worth is, they might start to attack you in some kind of way to get your private key. If you tornadoed that money in an address that can't be linked to other addresses anymore, the work to relate the address to you might be too big so people won't try.