That does appear to be the original use case. Even now, Quorum seems to be most successful in that niche.
In case anyone reading this isn't aware, blind programmers are working successfully in all kinds of programming languages. On that topic, check out this comment by one of my blind programmer friends [1]. I used to think that Python would be unusually challenging for blind people, due to significant whitespace, but many blind programmers are perfectly productive in it. And the NVDA [2] screen reader for Windows, which is developed primarily by blind people, is written in Python (and some C++ where necessary). Nobody made them use Python; they chose to. And they've attracted a thriving community of contributors and add-on developers. So syntax isn't really a problem even for blind people.
It seems that Quorum has had some success in helping blind students start learning to program. But I'm skeptical that a new language was really necessary or even helpful. I think a mainstream language would have been fine. The tailored IDE, libraries, and tutorials are probably bigger factors.