It will save you, because while your compromised machine could change the transaction before it's signed, the hardware wallet will display the transaction and t

It will save you, because while your compromised machine could change the transaction before it's signed, the hardware wallet will display the transaction and the change will be visible. Even if the user fails to properly check the destination displayed on their wallet, it still limits potential losses as the user will likely notice if the transaction is for a huge amount (their entire wallet).