Uuh, I am not sure. I believe that he was talking about having full disk encryption which means that he needs to input the password to unlock the boot partition.

You can use TPM2 to automatically unlock the root partition and not have to input a password manually at boot. This is how my laptop (running Arch, btw) is setup. Whether or not disk encryption is necessary for a system that is physically secure at home or elsewhere is debatable however. But a laptop can be easily left somewhere and disk encryption seems necessary unless it never leaves home.