Why ( 
real bewildered look on my face)? QR code is just a specific mapping of secret code expressed in characters. I can’t tell the difference between them when it’s a matter of choosing backup. But, at the same time, QR code ensures better data security when transferring across devices.
When the map is broken, you have nothing to recover your 2FA but with secret key, if one of characters is blurred or broken, you still can guess it from the leftover of broken character. real bewildered look on my face)? QR code is just a specific mapping of secret code expressed in characters. I can’t tell the difference between them when it’s a matter of choosing backup. But, at the same time, QR code ensures better data security when transferring across devices.I think it's really miserable excuse. Everything that is keeping on the piece of a naked paper can be broken. Make more copies and laminate them to increase durability, albeit I can understand you may thinking opposite, personal bias has the matter.