In some sense I agree, there is a level of defeatism in at least part of the wisdom of the stoics and very little questioning of authority. You do have the "If it's not right don't do it, if it's not true don't say it", and you are suppose to act on things if they are within your control. There's just no encouragement that you're more capable than you think or that you should do anything beyond "The best revenge is to be unlike him who performed the injury." That doesn't really topple oppressive regimes.

It's a bit of a interesting take, you should act with virtue, but there is no encouragement to act against oppression and question authority. It seems very much like something to ignore and hope there's not a clash.