I think it actually is a pretty big problem. "Once you absorb the ideas of Clojure" takes months or years to fully get. Composing libraries yourself, like your comment says, requires that they are "well-picked". Stitching together separate libraries is really time consuming and a distraction from the project you're trying to build. It also results in pointless thrashing within a team as everyone has become personally invested in their own mosaic of hand-selected libraries for every little thing. By the time a beginner learning Clojure has researched and put together their web stack and got it all hooked up and is ready to start, the Django developer already shipped their project last quarter, iterated on it a few times, and is on to the next thing.

One big library/framework has huge benefits and network effects, from enabling a big 3rd party plugin ecosystem, to a deeper documentation literature (including paid courses, books, and AI). It means that there's less or virtually zero getting up to speed when changing from one project to an other. It means that the upstream framework team takes care of upgrades whereas you have to consider, when a new technology comes up, how to integrate this into your stack. There's a reason that Laravel, Django, Rails, and Spring each have thousands or hundreds-of-thousands of times more websites in production than all of Clojure combined.

At a meta/discourse level, I also find the Clojure community's tendency to constantly deny and downplay any criticism or even just issue that people face to be really frustrating and counter productive.