Workshop decks doesnt care if opponent draws cards, it's the board state that matters in that matchup, which they usually outplay you fast by state effects you cant use drawn cards through spheres anyway.
Id compare this to Harsh mentor, which failed to make play.
I disagree. A creature deck like a junk deck or hatebear deck absolutely wants to draw cards. Notably they want to make a land drop every turn and draw Wastelands, Ghost Quarters and Plows.