It's best for developers working together with designers. If you're a solo designer, you don't need to push an app to production (or I'd consider you a developer), so you're probably perfectly happy staying in Sketch or Figma. As a developer, I really don't like having to translate my designers' work into JSX and CSS, so Pagedraw can do it for me!
If you're doing both the code and the design, and you like to design via the inspect element tab, then Pagedraw may not be for you.
What are front end devs so busy with nowadays that they dont have the time to code the UI?