The author of that rant is a purist. He believes that if everyone would slow down, learn Lisp values and implement them in their code, so that eventually they, and perhaps more importantly the next generation will be far better able to focus on essential difficulties rather than incidental ones.

His argument is that perl programmers are all busy solving immediate problems that would have never been problems to begin with if everyone had been using Lisp the way it was meant to be used. And they're often not solving problems in Lisp-fashion.