For me personally, part of my editing workflow is to either to correct mis-used headers or to add the code needed to use headers. This allows me to generate clean navigation documents and saves me from causing myself issues by accidentally hitting the generate ToC button.
I feel the request made would simply be slapping a coat of makeup on to hide the issue and not have the ToC setup fixed. One tool that might help some with doing this is the
ReworkChapterHeaders plugin.