If I understand you correctly, you interpret her post as saying: a powerful person is not afraid of others silencing them, but the cost/benefit analysis of sharing ideas out in the open tends towards the negative. For ideas she feels strongly about, she is not afraid to speak up; but for useful information shared in the spirit of openness, why invite the hassle?
I've seen this sentiment expressed often by prominent maintainers of open source projects, where they feel that their effort often leads to too much stress and negativity. Why bother with that, if you can just as well find a regular job that doesn't impact your personal life in a negative way? At some point, the passion of conviction gives way to the banality of everyday comfort.
"Silence" is in the title, and she is put into that state because of how other people react. There's nothing wrong with using the verb form of the word. Doing so does not imply fear.
I don't understand why you made that post after, in another thread, saying jmduke shouldn't have interpreted "silenced" that way.