A lost phone can be replaced. Once the Google Account is gone, all your digital stuff in there is gone too. Do you want to lose 10+ years of Email, Docs, Photos. With no way to recover? It's not the password or the passkey - it's the whole bloody account.

If you lose your driving license, but still have your passport things are easy.

What if you lose your passport, driving license, birth certificate and all other forms of ID? It's like that bad.