It could show the hash instead.
>No, it's not ok that these passwords are already out there
So it's better that people have to pay for it instead of getting this information for free?
>Because it's important to say "I don't store passwords in HIBP"
This is a personal choice.
>I'm not your personal lookup service
The idea is that this would be done by the site itself and would not require manual work by the owner.