What Garito says in this context is absolutely correct:

While neurologists learn about PN in their first year, they are frustrated because it has no cures or even treatments other than symptomatic treatment (which is not very effective in all or even most cases. So they go on to concentrate on epilepsy and many other neuropathies that are more well-studied and "interesting." and that have proven treatments or even cures. Finding a neurologist who really knows and cares about PN is very difficult.