Not at all. And the comment you link to is "just" social engineering. Tricking people into signing in someone else and then signing their transactions. Akin to

Not at all. And the comment you link to is "just" social engineering. Tricking people into signing in someone else and then signing their transactions. Akin to "hey I'm from paypal please give me your password so I can verify it is you". Or "I'm from Microsoft support, you have a virus please run this executable so that we can help you". But it is a problem. And they explicitly target old and other people that (statistically) treat any computer stuff as black magic and are more likely to trust a stranger because they say they are calling from a bank/whatever.