I disagree. True no one should be a martyr. But I think strong women draw a line & don't let people walk on them. It's not always "strong" to shut up. Sometimes you need to speak up & change the situation. Strong women don't stay in unfavorable situations if they can help it. Strong women DON'T shut up & deal they ACT & CHANGE their situation.
There is a special kind of covert narcissist who plays the martyr role so convincingly that most people believe they are an individual of extraordinary integrity. There is always the implication that this person is special because of their extreme self sacrifice for others. Nothing could be further from the truth. This is part of the covert narcissist's well rehearsed performance and an excellent way of being seen as a very fine human being.