Katharine Weymouth hasn’t had an easy time of it since taking the reins at The Washington Post. A series of decisions she made as publisher shook confidence in her ability to maintain the quality journalism and independence that had made the paper one of the high priests of journalism since the Watergate era. And she fell into a trap all too common for executives, regardless of gender, of seeming tone deaf to the public impact of the changes she was making, however necessary and meritorious.