In my opinion that definitely will help theoretically! But a significant number of users will find it complicated to use, in a business point of view implementi

In my opinion that definitely will help theoretically! But a significant number of users will find it complicated to use, in a business point of view implementing something that compromises user-friendliness isn't a good strategy. Probably this is one reason why blockchain based dApps are yet far from being mainstream. Majority of users of mainstream social network/email don't even use MFA to secure their accounts.