The ecosystem didnt come into existence by magic. The early adopters did have a choice into which language to invest their time. Obviously the R syntax alone was enough of an incentive to starts building useful libraries in it, instead of lisp, python, etc.
I'm confused. Are you saying that the package ecosystem is what makes R attractive, or that it's what makes it inscrutable?
I'm sure he's saying that package ecosystem is what makes R attractive.