There’s “not learning CSS - the syntax” and “not learning CSS - the tooling”. Tailwind helps with the latter.
I find organising CSS files to be pretty hard, and I've been using it since 2001, predominantly as a backend dev who needed to churn out a decent enough front end. Tools like Compass, SASS, Bootstrap, LESS have helped with all of that. Tailwind is the best integrated version of all that tooling that I've worked with.