It's not that anyone doesn't want to discuss it, I think it's more to do about the person and her behaviour, whether she was seeded or unseeded seems irrelevant to me when it comes to a final.

Let's be honest here, Osaka was just better than Serena, and Serena knew this and tried underhanded attempts to influence the referee and take the shine away from Osaka.  That to me is more relevant with regards to the seeded/unseeded part of the discussion.  To be so upstaged in a major final by an unseeded player speaks volumes about the character of Serena.