I'd say because JavaScript is insufficiently expressive. No macros, no arrow (pipe) operator, and the premier way of writing it is 4x as verbose than what I'd consider reasonable. D3 is a great library though.
According to the other comment it seems he meant the |> pipe operator that is under proposal in js
https://blog.frankel.ch/learning-clojure/2/
Something like a(b(c(d(e(7)))))) in Javascript could be written (-> 7 e d c b a) in Clojure?
(Trust me. I don't know jack about JavaScript, I had to get through the MDN docs to understand what they were, and once I did, made a whole lot more sense).
JS does not have a straightforward equivalent. The old and deprecated `with` keyword might seem similar but it's only a surface resemblance as it does not perform the return-value threading that makes the above pattern useful, it was meant for methods that mutate object state. There's a TC39 proposal[2] to add a pipe operator that would accomplish a similar thing to threading macros via an infix operator but it's still a draft.