See, people are used to, and are already pretty good at securing valuables such as cash (in a safe, at home, or on themselves). A paper backup presents to additional complexity to store securely. And Bitcoin offers extra advantages: losing your paper backup does not affect you ability to use the wallet, and you can have multiple backups, etc. So a hardware wallet is at least better than or equal to cash in terms of security.
See, people are used to, and are already pretty good at securing valuables such as cash (in a safe, at home, or on themselves). A paper backup presents to additional complexity to store securely. And Bitcoin offers extra advantages: losing your paper backup does not affect you ability to use the wallet, and you can have multiple backups, etc. So a hardware wallet is at least better than or equal to cash in terms of security.