Earlier quoted context omitted.
Generally though, web developers are of lower quality than native app devs. Often little or no consideration to the layers below, and their focus is more on security rather than speed.
Funnily, I'd say the reason web apps tend to be worse than native apps is because the web is so much more powerful and flexible. For a native app, I'm often limited to just a small set of components and maybe images I can put on those components. Animations are out of the picture. Configuring colors is sometimes not available but always painful (every component needs it tweaked, there's no universal way to change it)…
Only storyboards and XIBs were hard to style globally.
All of the flexibility, but a lot faster than web