Actually data-binding UIs (UIs that automatically update themselves when model variable changes) allow to do more in less time. So you just spend more time to reach the same result.
For example, I don't want to use non-reactive UIs (like vanilla JS or GTK) anymore. And it's sad to see that many (or maybe even most of) open-source projects still manually write code to update the UI and lose time on this. It's like trying to build a house using ancient tools.
