If the author is talking about UI/UX design, then I couldn't disagree more. In the practical real world, Designs need to be buildable. I've see too many months

If the author is talking about UI/UX design, then I couldn't disagree more. In the practical real world, Designs need to be buildable. I've see too many months, maybe years, wasted on trying to get engineers to implement difficult and/or incomplete designs. Designers that haven't considers all the data that can be displayed, all the states an interface can be in, responsiveness, accessibility, localization, etc. I think designers need to think more like engineers, and ideally work in tools that let them experience the engineering problems with their designs early on and first hand. Importantly, UI designers should not be working in glorified illustration software. Figma and friends have really led the industry down the wrong path.