Any person who has been abused, assaulted, etc knows that abusers often present as “upstanding.”
There’s no way you’d know. That’s why it’s common.
Good appearances are often a cover for abusers. In fact, many abusers RELY on their public reputation to intimidate partners from leaving (ex: “no one will believe you.”)
That’s why “vouching for friend” isn’t a substitute for a background check.
You wouldn’t lend a car to someone w/o a license.Why lend a gun to someone w/o a background check?