That's true, but until she speaks, we just don't know one way or the other. I feel sad for Kyron. I know Terri needs to do what is best for her though.
At this point, a lot of people would argue that Terri doing what's best for Terri is selfish, but Terri is no fool. She certainly understands she is the focus of an investigation involving a missing child, a child many believe is deceased, and with her possible naiveté and general poor decision making regarding Michael Cook, she has unnecessarily complicated an already complicated situation.
She could speak out, but what could she say? She loves Kyron and wants him home? Friends, and however you want to classify Michael Cook, have stated she did say she missed her children (including Kyron) and wanted them home. Terri didn't only post on Facebook about hitting the gym, she frequently posted about printing off and distributing flyers (in those early days in the investigation), but that is rarely if ever referenced. The opinion of many, perhaps most, is already fully formed. At this point, all she has is self-preservation. When I was a child, I frequently traveled and had to sit through my fair share of flight attendants demonstrating emergency procedures. I always thought it was cruel when the flight attendants instructed adults to adjust their oxygen masks first and then help their children. In my mind, I pictured frightened children gasping for breath, begging their parents for help, watching their parents adjust their oxygen masks and take a deep breath, alleviating their agony while the child continued to suffer. In my teenage mind, I vowed I would help my children first! When I became an adult, I understood the logic behind these instructions, and that decisions such as these do make sense, that there is a reason even if in the moment the decision seems cruel. Sometimes the best thing parents can do for their children is to take care of themselves, and in this case, if Terri doesn't look out for herself, she is less likely to be in a position to be a parent to her children long-term.
If Terri truly wants to mother her daughter and son, if she wants to prove her innocence, her attorney is advising her on the best way to do so, and she appears to be following his instructions. It may seem strange to us now, but perhaps later, when more has been revealed, it will make sense. The court of public opinion has already convicted Terri, and so in that regard what Terri has to say doesn't matter. Many here have said they don't want to hear her speak. If she is ever arrested or indicted she, through her attorneys, will have her day in court. She'll have an opportunity, in some way, to tell her side of things, and the prosecution will be able to fully expose its case against her. I prefer to wait for that day (if it ever comes), when I have more information, before making a firm decision about what happened to Kyron.