When you have this card in your hand, you have a choice. Either draw a card for zero resources or spend a resource to play Quantum Flux and basically draw a card. I'd rather have the resource and I'd definitely rather have filled this card slot with a card that did something worthwhile. The default cost of drawing through your deck is just a horror. Perhaps you're better off putting a card in that just heals horror, if that is a concern.
It is worth mentioning that there's an encounter card in Dunwich Legacy that this card perfectly counters. I wouldn't fault someone too much for playing Quantum Flux in the Dunwich campaign, but there are ways to counter that encounter card that aren't a waste of a card slot, like Ward of Protection or just finishing the scenario in a timely fashion or resigning when your deck gets low.
This card will also occasionally benefit you by updating the distribution of your deck as you shuffle in your good cards before you happen to draw your weaknesses, but this is offset by the times you have already drawn your weaknesses and Quantum Flux becomes a sub-par skill card.