This guy is absolutely right - the C in CSS stands for cascading.
What Tailwind is doing is rewriting the whole thing that CSS is and putting it into easy-to-write classes.
This could be handy to you, yes, but unfortunately you're missing the whole point of CSS which is to have cascaded stylings.
To help you understand this a little bit better, one could have a look at why CSS was invented and where it comes from:
In the desktop publishing world (books, newspapers, etc.) this kind of cascading layout rules were used long before there was the first HTML page on the web. This should be nothing to be mixed up with regular programming. Change your view on that thing and you will understand.
It may sound harsh but Tailwind is a way to tell "I'm a programmer, I don't understand CSS and I'm not further interested into".
Maybe coders aren't the usual targeting group but print media is paying plenty of cash for typo licenses.