Or at least, they're not worth the hype they're given. The wheel is constantly turning, and the hot new framework of today is just a re-hash of something already done years ago with a pretty facade.
You probably learned the actual fundamentals of the web, which is exactly what a good developer should do. Nowadays "frontend devs" don't know how to make the most basic functionality without React, Bootstrap, and 99 other pieces of bloat.
Frankly the stuff I look at just disgusts me on a fundamental level. Like as soon as you decide to use React, you've just mandated up to several megabytes of JavaScript simply to render your HTML. That's abhorrent.