I don't agree with the other commenter. The point you make is a fair one.

However, I think the real information in your comment is that there are people making websites and web apps who aren't frontend developers. They're likely fullstack who are much more backend focused, and who do the frontend more out of necessesity than enjoyment. Tailwind enables those people who aren't experts in frontend to make things for the web without the necessary expertise to write CSS themselves.

That's why it's valuable - the point of Tailwind is that it solve the pain point (not knowing CSS) with money instead of time. But now people can solve it with AI instead.

This is a poor analogy, but maybe we should consider CSS as a lower level language than Tailwind, similar to JVM bytecode to Java. There are plenty of people who will tell you that a real Java developer understands the bytecode, but that doesn't stop people writing code in Java without knowing the lower level.