Why hasn't AI improved design quality the way it improved dev speed?

There are some great design tools out there.

Some of the new ones do create brand design systems.

Check these out:

https://stitch.withgoogle.com

https://labs.google.com/u/0/pomelli

https://lovable.dev

Also Claude Code is also fantastic for design

Going from a one-prompt to a great design isn't really realistic. You'll need some iterations in design just like proof of concepts (for iteration) for engineering work to refine down what you're really looking for.

speed != quality

Clickbait.