The point is: learning to design or become a doctor takes passion, dedication, time and often money. To expect everyone to learn how to code, and to code well, on top of what they're already passionate about is counterproductive. Another point is: software will look a lot different if the experts in their fields can build their own.
Yes, we think in text or, more accurately, a language. But only a small percentage of us can think in code, yet software businesses will continue to come online at exponential momentum. Having visual, drag and drop components is more universally accessible. If computers actually began to understand how we think (and by "we" I mean including those of us who aren't engineers), then the future of innovation is open to everyone and that's ultimately the vision of Bubble.