[scrollaway]

You are wrong. The primary advantage of 2fa is the OTP part, which wards against keyloggers and password reuse.

[jfrunyon]

Unless of course the keylogger also has access to the OTP.

If your device is compromised, your device is compromised.

It doesn't matter what the advantages of 2FA are. You don't have 2FA ("two-factor authentication") if your factors are stored together.