Perhaps undulation has some things in common with quirk. If it is done intentionally by the architect, it is met with suspicion, but if it is found and used by the architect then it is embraced.........unless there's just too damn much of it.
Is there ever a situation where a hole is routed over some undulating landforms that defeat the intended strategy of the hole, but are kept anyway, for whatever reason (cost, drainage, undulove)? Or even just a greensite that has natural undulations that tie the green into the surrounds, but don't work with the strategy indicated by the rest of the hole, but are kept anyway? That might be undulation for undulation's sake. But I may just be pulling the beard extra hard here.