Take a guess at what “dark:bg-gray-950”, “bg-white” or “min-h-screen” means. You get them from context.

Imagine if you put a little bit of effort into learning Tailwind. You’d get the more complex declarations as well.

As to why it’s better than a class declaration, a lot has been written about using atomic, composable utility classes over reams of “write-once” class declarations.