Even if it were true, it's not as though there is no choice in other language communities.
What python web framework should I use? I can choose among several well-documented, supported, maintained systems; and if I need an extra library for a specialized task, there's a packaging system to install it (and it's probably well-maintained and documented, as well).
The times I've looked at lisp I just don't see that at all. Look here:
Those frameworks are all either dead or pre-production-quality.
I'd like to like lisp, but I find that I'm a software engineer before a computer scientist. Things like a good extension mechanism, good documentation, a complete standard library, and a robust community matter more to me than a powerful macro system.
Clojure and racket may be exceptions. I'll probably try one of those out.