Accurate reconstruction is entirely up to the camera's ability to orbit around the object. If we are talking about cracks, the visual signal will be very poor as we can't wiggle a camera inside a crack.

On the other hand, if we want a 3D reconstruction of a route in general, using a drone, then that's very doable. We still rely on 2D climbing magazine/book/app to view a route, where the contour of the route itself is highly desirably imo.