She's playing to the public and her supporters (who donate a LOT of money to her legal fees). Karen wants to tell her story but defers to her lawyers. It's ultimately up to her and if she wants to tell the story then get on up there and tell it. No one is stopping her.
Presumably people are donating the money to her because they think she's innocent. I'm sure they would support whatever legal strategy is the most likely to get her a not guilty verdict.
If her supporters really want to know her story, they can read her book after she's exonerated.