Trezor didn't save you, the criminal's lack of knowledge about Bitcoin did. And some robbers could have just taken a hardware wallet without knowing what it is, to figure out later, or maybe they would have though that it's some sort of USB drive with valuable data? You need to store your hardware wallet in secure place, relying on criminals not knowing what to do with it is just security by obscurity, and this security is extremely unreliable.
Still trezor saves him because its appearance is not really attractive to robber tho. It just mean that the aesthetics design of trezor really sucks that robber don't have any interest on it. A blessings in disguise. Actually it's appearance is not really good and it looks a very cheap item. Robbers is on rush so they don't have time to get an item that they are not familiar. They already planned what items they will only get to save time for escape.