Yes, I am replying to my own question , because my thoughts have evolved, and it seemed better to put this as a separate idea.
First, thank you for your thoughtful reply, Rick. From what I have seen, most WikiTree profiles don't have a Research Notes section. That means that in terms of contents, the DNA section will be a subsection of Biography in most profiles, but is found instead as a subsection of Research Notes in the profiles that have that section.
Perhaps the best solution would be to make DNA a section == DNA == that gets entered directly above Sources, instead of a subsection === DNA === that can end up within different sections of profiles. Thoughts?