Are you okay with buying a new computer running the operating system and browser someone else wants to access your bank's web site?
You can still use you current computer and bowser to access HN.
Will this person's bank implement WEI in such a way that none of this person's devices (computer, phone) are supported and will this person not be willing or able to switch banks, only then buying a new computer comes into view. Without knowing anything about this person, assuming average, the chances for this must be low or the bank will have no happy customers left.
I fully agree with the underlying worries you and others in this thread have, but to extrapolate that without any nuance into a world where we all become privacy-less, ad consuming, eye tracked zombies on newly bought computers is not helping the case (in my view).