Emacs has this property because it uses Lisp. The general tendency for programmers to start writing everything themselves was noted, for Lisp, but was named “The Lisp Curse”¹. It is a curse because programmers stop collaborating. Everyone becomes their own wizard in their own tower, and overall progress stops, and a dark age sets in.
1. <https://www.winestockwebdesign.com/Essays/Lisp_Curse.html#ma...>
Is you actually look at the Lisp ecosystem as it exists today (even just Emacs by itself) you'll quickly realize that none of this is true in practice. Other people have pointed this out.[0]
[0] https://applied-langua.ge/posts/lisp-curse-redemption-arc.ht...
And if then you compare it to e.g. Python (or JS) ecosystem, well. It's all very relative, isn't it?
It's not clear to me what you mean, can you elaborate?
The curse actually feels more relevant to me to ruby rather than lisp.