There were really nice looking themes for the 6300 e.g. here: https://www.deviantart.com/search?q=6300%20theme

And WinAmp was kind of famous for its themes. If well done, they didn't look amateurish at all. Even better than the original.

But it's true that currently most UIs that don't look like all the others quickly seem half-baked.

Anyway, having even a little theme support in popular programs would fix issues like the posted one easily.