Using the headings in Bold or in the ===XXX=== format produces a a profile that looks similar but using the "===" on the headings also makes a table of contents at the top.
When you are editing the profile in the edit version, it also makes finding the sections easier.
I guess if you want to only work in the text editing mode for research, fine, but I personally prefer the look of the Public Profile (left green box) and try to tailor my biographies to look good in that format, with a table of contents on the top, and in-line references on the bottom with the other sources.