Exactly. Something like Tailwind should be done in the Sass*, not by assigning a...

Exactly. Something like Tailwind should be done in the Sass, not by assigning a gazillion helpers.
Have a component-type class in the component then use Sass to configure that with helper properties (read: functions and mixins, etc.)
But hardcoding? Inline? I did that in 1997.

Keyword in. I know TW is done with Sass