It is more expensive and that is clearly a factor. A portion of the course is significantly up and down, and I think that makes the utility a harder fit. For me, I would rather ride a cart. And from taking to the staff there, usage is dominantly one and done.
If I had to pay 30 more on tip of my other green fees and cart fees every time I would be out too.. I am curious to ask some courses if they would allow these if I owned my own. At 30 bucks a pop it does not take all that long to make it worth purchasing if allowed.