I think that an important thing to point out is that the creation of bi-directional links through [[]] structure should not really be the most important part of the roam activity. The main important point of roam activity is to write notes in blocks, with occasional [[ ]] around the key terms, or something that seems important.
Then, if a user decides that a particular topic of interest looks promising the person can go to the [[]] page, review linked and unlinked references and expand on that topic. Focusing on bidirectional links makes no sense in the long run. The point here is to keep writing notes and use the Roam provided serendipity