Life isn't fair but accepting unfairness uncritically will result in more unfairness. I agree with working on differentiating between degrees of unfairness is a good thing but to say you must accept unfairness and can do nothing can result in learned helplessness (personal experience).
Teaching children to be strong enough to stand up to injustice is very different than enabling poor me thinking.
Life is not fair. Learning to accept that is very different than ignoring injustice. I've seen kids whose parents entire focus is on protecting them from the unfairness of life, and that can be just as paralyzing as parents who don't teach kids that they have power over their own circumstances to make changes for the better.
