What gives better security is always any offline events, if you back up your seed phrases offline like using the crypto steel [4] type of backup you have more security than back up your recovery seed phrases online even with encryption.
Even using something similar to encryption which is word extension can make the backup very secure and no need to depend on encryption. Also as the wallet is on airgapped computer, alternative backup like encryption the seed phrase or the wallet file on a USB stick is also an option. There are 100% ways to security and safety if you wish for one as long as it is bitcoin.