> I will never use their services again, I was really digusted by this failure.

Without such measure anyone with your password could "reset" your 2FA.

The solution to "I may lose my 2FA" is not to make GMail a 1FA: it is to configure beforehand your GMail so that if your account is inactive for 6 months, access to your account is given to a person of your choice. It's so that a death spouse (for example) can eventually access the account.