In this case what if you use 2FA while browsing with your phone. Wouldn't that also contradict the purpose? The main purpose is that people won't get phished a

In this case what if you use 2FA while browsing with your phone. Wouldn't that also contradict the purpose? The main purpose is that people won't get phished as easily or if they reuse passwords it can't be abused. Or if password was to leak for any reason.