I think that is correct, but the problem is that this was only a minor part of several reasons she actually gave in her speech for quitting. It's the other reasons that make her seem less strong, and raise more questions.
No, they don't. The reasons she gave in her speech are perfectly logical, ethically justified, and do not in any way make her less strong. To the contrary, they show she has the integrity and courage to put her family, her state and her country first and do what had to be done to deal with the situation facing both them and her.
As for your comment about "raising more questions", so what? Questions are fine, they're part of the process. So is speculation. It's pretending we have all the answers that is the problem. It's far too soon to know how all this will play out.