Comment by Jensson

The "unreliable CA" you are talking about here happens to be banks and similar. Do you trust that your bank doesn't just steal your money? Yes, you basically can't function in modern society if you don't. These e-id's just piggybacks on that trust to also work on online sign-ins. Most people worry more about their bank account being compromised than their github, so if these CA's (ie banks) starts to abuse their position we would have way bigger troubles than someone stealing your github accounts.