My interpretation is that the Federation brass have scapegoated Michael somewhat. They were blindsided by the Klingons in a way they probably shouldn't have, and pointing at the mutineer lets them deflect criticism. "Our policies and methods aren't wrong, it was this officer acting outside of them."

While yes, her shoot-first strategy was likely not going to succeed, she did come up with the second capture-the-leader tactic that might've worked if she actually went through with it. Regardless, a lot is on her and rightly so.