I think Tailwind is more accessible to many[*] less experienced or CSS-oriented developers.
Big generalisation, I know, please don't yell at me, but many of us can get 99% of Tailwind's value with UI libraries supporting:
1) style encapsulation,
2) colocated presentation/content/behaviour and
3) a more minimalist mindset/habits when building UIs (e.g. relying on simpler styling hierarchies, native DOM elements, semantic HTML instead of div soup).
[*] not all, it doesn't mean that it doesn't make "senior" (whatever that means) devs more productive or that if you're using Tailwind you'll lose your 10x dev of the month badge. But, CSS is a misunderstood yet very flexible language which means it can be used or abused in a huge variety of ways.