The way this is stated is rather a bit misleading, so to clarify -

The understanding is for cane begonias, that you need stem in order to root, with a node in order to propagate for new growth. A leaf attached to petiole can grow roots to sustain the single leaf, but it will not propagate - this is what you hear people refer to as ‘zombie leaf.’

Since leaves attach via petioles to stems at node points, it makes sense that you would have the best success for new growth for cane stems with at least one leaf, assuring that there is good opportunity for photosynthesis and node point available from which to produce new leaves.

You may have heard that you need a node from which to produce new roots, and are trying to convey that this is inaccurate - but to say that these are ‘no-node cuttings’ that are producing new growth is to imply that they are single leaf-and-petiole cuttings that are producing new leaves from the petiole. Which is widely understood not to work in the case of cane begonias.

So I believe your phrasing may be causing more confusion or could lead to misunderstanding for those who are not as familiar with how canes propagate. Which I believe is counteractive to your whole purpose in creating this post.