why would i pay $99 for a thing that i might lose, when i can just print off a secure wallet.
When you set up your trezor, it displays a series of words that you can transcribe into a paper wallet. If you lose the trezor (or it's damaged, etc), you can regenerate your wallet with the word list.
This destroys the "I lost my device" argument. But still, he's right, you can just print a paper wallet.
The reason I like Trezor is that private keys never leave the device. But accessing it's seed would be just as easy as accessing the private key of a paper wallet.
It's also a bit more convenient if you need access to cold storage frequently.