Three simple reasons from my perspective.
1) She’s been narcissistic, insolent, and shady. For the first year or so of her ban, training with the team, being coached by the team, and making teammates uncomfortable.
2) She refuses to take responsibility, and instead has gone on a self-pity/victimization tour that is reminiscent of Lance Armstrong. Perhaps unfair, but her responsibilities are the same as all her competitors, which is to control what got in her body. She failed. Own up.
3) She only appears on interviews with people who are sympathetic and manipulable. In response to skepticism, her best defense was to go on a podcast with that HS boy who idolizes her, and she used him to be her spokesman and control the narrative. If she really had nothing to hide and believed in herself, go on with Ross Tucker or someone who wasn’t merely simping.