I get it : the choice is made knowingly by the player. If I were to design around this, I’d use a few secret cards, appart from the deck, that sometimes lead to a Lead (!) and sometimes are just “nothing special” flavour text or even a setback, for investigations, where asking too much questions could trigger some unwanted pushback. I like this element in noir stories.
I’ll try to oblige you and flesh this idea out before 2023.
(Piste = Leads… bon sang mais c’est bien sûr !)