Let me know, where you save your passphrase today, on a paper?
I don't think anyone with crypto for long time is going to have their passphrase only in a piece of paper or in digital format with single point of access.
CryptoPlatz Card it is to save you passphrase or mnemonic on a device more resistant than a piece of paper.
What benefit does it bring over saving passphrase on
a metal plat or any other fire resistance methods available?
I agree with you, it is important to have more than one backup of seed recovery phrase
When compare with metal plat, there are a lot of benefit, but the most important is you can save the passphrase encrypted with AES-256. So if anyone put the hands on the card, they can't read the passphrase.
