Not everyone does it, speaking up is a scarce good.
And when we do, when we speak up, it’s not guaranteed we do it at the right time, with the appropriate words, with an elaborated statement, ..
So, there is no good in remaining silent, even more when we see something unfair, an injustice or something that is simply wrong. But we need to find the time and the words.
Just speaking up will probably make us feel better, but it will be only for a small space of time. Consecuences can be terrible, we might regret what was said, because HOW we said it does fit in with our way of being.
Speaking up is necessary, mostly when silence is ruling the world. Just, listen to good advices, think, order your thoughts and speak. You will not regret doing so.