How will you log into your email from a strange computer without your phone. Gmail has required 2-factor auth for a long time.
You have to set up those backup codes and keep them in your wallet or somewhere independent of your phone and in your person at all times.
I get your point, but believe it or not there's more email services than just Gmail
You have to set up those backup codes and keep them in your wallet or somewhere independent of your phone and in your person at all times.