This is an incredibly silly argument because Tailwind has always required you know CSS, or at least understand how it works. The selling point of Tailwind is a more convenient and co-located way to write styles—the utility classes map pretty much 1:1 to CSS properties after all.
Covering more CSS features with Tailwind classes does not make Tailwind inherently more complicated, it just adds a way to express more CSS that you need already know about.