They are also quite helpful techniques that helps to secure the bitcoin wallet. I'm not saying Human vigilance isn't important or essential, but I stand to believe that it's not the primary as there are things that are more important.
Your funds is only as safe as the device you store it in, i.e. if you store your funds in an airgapped wallet, it is safer that someone who stores theirs in an online machine. However, you must also know exactly what you are doing, so many people create their airgapped wallet in an unsafe environment and end up losing their funds. Opsec is also very important, as well as implementing extra layers of security, i.e. extending your seed phrase with a passphrase or setting up a multisig wallet.