I am looking at it this way, maybe I am wrong. I reckon, someone who enters "big bang" in a Search, no the, no theory, no CAPS, ought to easily get to either (main-ish or primary-ish) article, because they could be looking for either article. So, if they have to wade through 10 or so entries on a Dab page, that works for me, the other entries are for free and might entice a look. 
 Else, do the compromise that user:DL suggested, I don't know how the full details of how that will work, myself, but it seems workable and suitable at the current state of consensus. Ty  ( talk)