This exact situation has been something I have wondered about for a while (what would happen if a professional athlete just flat out refused to engage with the media) and I think it's fascinating that an athlete is being punished because they won't take part in the media sideshow.
I'm fully aware that by the rules of the tournament, they are expected to, and I have no real interest in tennis, but from my perspective this feels punitive against an athlete as though the media have this attitude of "how dare she not subject herself to our dissections".
Fully acknowledging that the media are the main source of revenue for these sports and subsequently these athletes, it is still such a strange relationship the athletes and the media have whereby an athlete not only needs to be amongst the best in the world at their chosen sport, but also need to be skilled in PR and be willing to dance to the whims of the media.