100% agree. MB's statements are disingenuous and by no means should she be given any slack. I think everyone agrees that she knows more than she is saying and it is in her best interest to lay it all out on the table.
That said, I too am curious about the "why". Not "why did this happen to EB" but "why is MB continuing down this path". Is she protecting someone else along with herself? If so, who...AB? If AB...why?
Today, when MB was escorted into the courtroom, she immediately looked into the gallery. She did this several times after taking her seat (between diverting her attention back to the judge). What some saw as a killer playing up to TV cameras, I saw as a child looking for the familiar faces of family. Much like a kid hitting their first homerun in little league and looking into the crowd for a parent after tagging homeplate. MB did not find those faces. She looked again and again and found no one. In that moment, she had to know she was alone. If she didn't know it (or didn't want to know it) during her entire disfunctional childhood, surely she knows it now.
Maybe that's the best thing that could happen right now. Maybe it forces her to move toward reality (unless she is otherwise incapable of doing so because of sociopathy). In that moment, any 18 year old with a "normal" functioning brain would realize that no one is going to swoop down and save them. That they have officially entered adulthood, where consequences truly exist. Where playing stupid games means winning stupid prizes.
Did MB realize that today? Did she realize that no one... not EP, HW, TBsr, TBjr or AB, not even her ever supportive Grandmother is going to help her? She is in this alone. For someone who is accustomed to living off of other people, using manipulation so others will provide for and sustain her existence... I imagine that could be an extreme "big girl panties" moment.
Or...instead of letting it affect her emotionally, she just tucked it away with a lifetime of other hurtful and disappointing moments. If that is the case, I expect she will continue on her current trajectory and we may never know what happened to EB.