Everyone else already said it, but you are completely dead wrong. Very little of the stuff on 4Clojure has anything to do with mathematics. It is about teaching you the standard library, concepts which are as common and fundamental in Clojure as std::map is in C++ or as list comprehensions are in Python. Without learning the stuff on 4Clojure, you will not be able to productively do anything with the data that comes back from the database, or transform data for delivery to a web service.
You can criticize it for being too much to learn, if you like, and keep writing Perl and Python. That might be a fair criticism, insofar as it would be nice to have a better-paved road to mastery coming from the land of imperative languages. But you can't criticize it for being abstract or unnecessary for programming in Clojure. It is not.
You can criticize it for being too much to learn, if you like, and keep writing Perl and Python. That might be a fair criticism, insofar as it would be nice to have a better-paved road to mastery coming from the land of imperative languages. But you can't criticize it for being abstract or unnecessary for programming in Clojure. It is not.