>>103707177I think being a mystery writer was also actually the reason Fred disappeared in the 80's toons. And I think Velma owned a bookstore in Zombie Island and/or Witche's Ghost. And in the first live action cartoon network movie during their Breakfast Club style Saturday detention where they all become friends, Shaggy notices that everyone is reading mystery novels.
So they all like mysteries and Daphne is also often depicted as a reporter, so she obviously has a desire for the truth.