I just can't see making a strong run with a weak defense.
Recently, someone posted that shortstop wasn't really a focus (paraphrasing) of past Sox teams that won titles. I looked them up, and all had positive dWAR for Boston in '04, '07, '13 and '18: Cabrera 0.9, Lugo 0.8, Drew 0.2 and Bogaerts 0.1. While I'm not an expert on calculating WAR, I understand the acronym as a stat showing that all Red Sox championship shortstops this century were therefore better than a "replacement player."
So far this year, Kike Hernandez is a negative dWAR shortstop. I'm not sure how his handful of games at second base or in centerfield factor into his total dWAR, but he has 14 errors at short and zero at any other position.
Since WAR is now probably the most popular metric used to gauge player value, considering its very definition... how hard can it be to find a replacement player to replace a guy currently performing below the norms of a replacement player?