To my understanding, the point is that it will make you more aware of your limitations, which (again, in my opinion) will make you a better programmer. And I do

To my understanding, the point is that it will make you more aware of your limitations, which (again, in my opinion) will make you a better programmer. And I don't think your comparison to physics is apt: your customer doesn't see or care about physics (unless you're designing hardware, in which case you already know physics), and you don't work with physicists. Your costumer _does_ see the visual design and UX of whatever you're building (everything has at least UX) and you (potentially) work with visual designers.