This is likely true for many types of chemical burns whether from an acid or a base. However, you should do a little more research on HF and hydrofluoric acid... the mechanisms are not the same.
From reading the article, HF is particularly nasty because the primary reactions cause the acid to break down and release fluoride anions that readily diffuse through tissues causing a host of additional problems when they hit something with which they will react, like bone or nerve cells.
So it's almost like an acid the breaks down into a nerve gas. I would imagine inhalation of even a little HF gas would cause death, as the anions would be directed almost immediately to the brain. Yuck.