For larger clients who are familiar with the design process that's true. But for smaller clients, I would 100% take a working, "wrong" version of a site based o

For larger clients who are familiar with the design process that's true. But for smaller clients, I would 100% take a working, "wrong" version of a site based on a design file over Sketch iterations any day. You'll get immediate, actionable feedback much faster (ex. "I don't like button X, change it to Y"), often times with less effort and a happier client at the end.