But the point is, surely, that if she was so powerless as to prevent the party from picking an out-of-state extremist who was certain to lose, she could have done the honorable thing and resigned early from that post?
That sounds great, but no one in that post would have had any power to prevent it. The popular perception is that she ought to have acted alone, when the only way she could have acted is in an advisory capacity, which she did. The state central committee completely ignored her and everyone else.