What you are describing is by no means a new phenomenon. ESPN has been personality driven for decades. Stuart Scott, Kenny Mayne, Chris Berman, Dan Patrick, Keith Olbermann (the apolitical version), etc.
The competing sports networks are no different - Jim Rome, Colin Cowherd, Skip Bayless, etc.
Opinionated BS you say? Well, BS is in the eye of the beholder, but opinions are what we as media viewership demand. In our news as well as our sports.
Remember ESPN News? (Its original incarnation, not whatever it is they broadcast now.) It consisted of 48 half-hour sports highlight shows per 24 hour day, presented by anonymous hosts. Nobody watched. Nobody cared.
I don't follow much sports chatter either. But clearly enough people do to justify its continual presence.