It's not.
Discussion
why ?
Because an "email, a cloud account, and a face scan" are not Bitcoin keys. The keys still need to exist. How are the keys stored in these three places? Do you think someone's email account password is more secure than a cryptographic key? Most people use the same email & cloud storage, and a picture of someone's face can pass a face scan. Not possible that it is more secure than keeping the keys yourself, especially if you do a multi-key (or split-key) approach and keep the keys in different physical locations.
keep the keys in different locations is more ways of losing it.
You can learn more here : https://zengo.com/how-zengo-guarantees-access-to-customers-funds/
The keys are stored and encrypted and never share to zengo or you, that's the magic and high security level of MPC.
In case of Zengo is out of business or the servers are down, they activate a emergency recovery mode with trustee, it needs to be confirm by humans, and the keys are send to the customer for withdrawing in any other wallet.
Ok, you can believe whatever you want. Sometimes people believe in bad ideas.
You can store encrypted keys from a COLDCARD yourself. You can also get a 2-of-2 multisig with a timeout through something like Blockstream Green. Or you can do a 2-of-3 with 1 counterparty through Casa or Unchained. There are a lot of options, and they all use standard formats (like BIP-39) and best security practices.
Google Cloud & face scans are not the way to do Bitcoin. Certainly not the safest.
here you can see videos of attempts of face scan with pictures
And with a high-quality 3D mask. The face scan is always improving using IA